The southern school where Sōshū steel met Kyūshū. Founded in Chikuzen by Samonji — son of Jitsua and a student of Masamune — the Sa line carried the Sōshū tradition into the Nanbokuchō, from the founder’s celebrated 大左 work through the later Sue-Sa generations.
Other smiths of this phase— students & parallel lines
Sub-schools— branch houses of the Chikuzen Sa School
The Chikuzen Sa School (左文字) Lineage
The The Chikuzen Sa School (左文字), active 1330–1450 in Chikuzen Province across 74 documented smiths: 4 Kokuhō (National Treasures), 17 Jūbun, 20 Jūbi, 42 Tokubetsu Jūyō, 257 Jūyō.
Phase 1 · Ō-Sa (大左) · 1330 – 1344
At the head of the Sa line stands its founder, the smith who cut the single character 左 on his tang and is read in the published genealogies as Saemon Saburo, called O-Sa or Samonji. The NBTHK setsumei place him as the grandson of Sairen and son of Jitsua, the old Chikuzen succession of Ryosai, Sairen, and Jitsua whose steel ran sunken and rustic in a *suguha* the school inherited from Yamato. Since the Muromachi sword books he has been counted among the pupils of Masamune of Sagami, one of the Masamune Juttetsu, and the judges treat that *Soshu-den* schooling as the pivot of his identity: against the provincial manner of his forebears he is the reformer who carried the Sagami idiom into Kyushu. His working life falls in the early Nanbokucho period, and the single 左, often paired with 筑州住 on the reverse, becomes the founding mark from which the whole line takes its name. This is the apex generation, the work of O-Sa's own hand rather than the broader Sue-Sa pupils who follow.
What the setsumei describe is a steel that runs bright and clear where the older Kyushu work ran dark. The *jigane* is a well-knit *itame*, tight *ko-itame* on the small *tanto* and standing more open on the wide *katana*, carrying dust-fine *ji-nie* thickly, abundant *chikei*, and a faint *nie-utsuri*; the verdict recurs that *ji* and *ha* alike run limpid and *saeru*, one judge noting steel that shows "absolutely none of the whitish cast or blackish tone" of lesser Kyushu work. Over that ground O-Sa tempers a *Soshu-den* *notare* mixed with *gunome* and *ko-gunome*, the *nioi* deep and the *nie* thick, with *ashi* and *yo* entering and fine *kinsuji* and *sunagashi* drawn through the *ha*; *yubashiri*, *tobiyaki*, and *muneyaki* appear on the broader blades. The *boshi* is the structural signature the judges look to: it thrusts up (*tsukiage*) to a pointed tip, runs long *hakikake*, and returns at length. The *tanto* are small, of thin *kasane* and *hira-zukuri*, with a withered (*kare*) *fukura*. Set against this, the later Sue-Sa hands read as weaker and more standardized, their *midare* shallower and their *ji* less keen, so that O-Sa stands alone for the force of his pointed *boshi* and the brilliance of his Chikuzen steel.
For kantei, the setsumei route attribution first through the *ji* and the point: the bright, clear *ji-nie* free of whiteness is what separates an O-Sa blade from its Soshu fellows when the thrusting, pointed *boshi* alone will not, and the record divides cleanly into signed *hira-zukuri* *tanto* of flowing fine chisel and *osuriage-mumei* *katana* papered Den Sa. Signature works anchor the phase: the Kosetsu Samonji (江雪左文字), repeatedly named his only surviving signed *tachi* and a National Treasure, and the Danjo Samonji in *kanmuri-otoshi-zukuri*, held by the Uesugi house. Named *meibutsu* run through the great families: the Onishi Samonji passed through the Doi and Tokugawa to Arima of Kurume, the Homoji to Tachibana of Yanagawa, others to the Owari Tokugawa, the Sendai Date, the Sakai of Himeji, and the Inaba; one *tanto* recorded in the Kotoku Toezu was among the personal swords of the Taiko, Hideyoshi himself. The Sa school is the place where the Sagami manner becomes a Kyushu one, and these blades are the record of that transformation in O-Sa's own hand.
Sa (左) — Mainline · 1334-1338. Kokuhō, Jūbun, Jūbi, Tokujū, Jūyō. Sa, commonly called O-Sa or Samonji, is the Chikuzen smith who carried the Soshu manner into Kyushu and stands, by the count of the Muromachi sword books, among the pupils of Masamune. The published sources read the single character 左 he cut on his tang as an abbreviation of Saemon Saburo, and place him as the grandson of Sairen and the son of Jitsua, the line of Chikuzen smiths descended from the old Kyushu tradition. That tradition, in the words the NBTHK restates on blade after blade, was one whose 地刃が沈み、鄙びた直刃調のもの, a sunken, rustic suguha inherited from Yamato. Against it O-Sa is the reformer: he broke wholly from his grandfather's and father's manner and is credited with having 垢ぬけした乱れ刃の作域を創作, founding a clear, unprovincial midare style, and so lifting Chikuzen work to a rank it had never held. Around him a large school formed, his pupils Yasuyoshi, Yukihiro, Yoshisada, Kunihiro, Hiroyasu, Hiroyuki and Sadayoshi each carrying the manner into the Nanbokucho years and into the later history of the Kyushu blade. He worked in the Genko and Kemmu years of the early Nanbokucho period.
What the change amounts to is a steel that runs bright and clear where the old Kyushu work ran dark. His ji is an itame, well knit on the small tanto and standing open on the grand katana, carrying ji-nie laid down dust-fine, 地沸微塵, and frequent dark chikei. The published record returns again and again to the same judgment, 地刃共に澄んで明るく冴える, that ji and ha alike are limpid, bright and lucid, and on the finest pieces the NBTHK adds that the ji has neither the whiteness nor the blackness of lesser Kyushu steel. Over that ji he tempers a notare base mixed with gunome and ko-gunome, the *nie* deep and the *nioiguchi* bright, with *ashi* and *yo* entering and fine *kinsuji* and *sunagashi* drawn throughout the *ha*. The reform is summed in a recurring phrase the sources use for his new manner, 地景や金筋の目立つ乱れ主調の新作風を樹立した, an irregular temper led by conspicuous *chikei* and *kinsuji*.
The single feature that most reliably marks his hand sits in the *boshi*. Across his surviving work the temper of the point thrusts up and runs to a sharp tip with a long brushed return, 突き上げて先が尖って迫力があり, the published sources noting its force and its long *kaeri* even on pieces where they decline to fix the individual hand. On the tanto a faint *nie-utsuri* rises in the ji, the *ko-itame* knits tight, and the *ha* keeps a quieter, more even register; on the wide katana the temper grows fuller, *yubashiri*, *tobiyaki* and *muneyaki* appear, the *nie* thickens and at times turns rough, and the whole carries what the NBTHK repeatedly calls a *haki*, a martial spirit. The activity is read first in the ji and in the point, and the bright Chikuzen *ji-nie*, free of whiteness, is what tells him from his Soshu fellows when the *boshi* alone will not.
His record divides cleanly into two registers, and the division is the key to reading him. The signed pieces are almost all small tanto, *hira-zukuri*, with little or no *sori*, thin *kasane* and a withered *fukura*, signed in fine, flowing chisel 左 on the omote and 筑州住 on the ura; these the NBTHK calls his canonical work, one such described as 左文字の見どころを余すところなく示した典型作, a typical piece showing every point of recognition, another as 相州伝上工の実力を遺憾なく発揮した, the full skill of a first-rate Soshu hand. The grand katana, by contrast, are *osuriage-mumei*, wide in the body with little taper and a *kissaki* extended in the Nanbokucho manner, papered as Den Sa. A third group is read only to the school: a piece marked simply 左, or carrying a red-ink 三木左, often means the broad excellence of the Sa line rather than the master himself, the published sources cautioning that 個名は特定し得ないまでも, even where the individual name cannot be settled, the thrusting, pointed *boshi* should not be overlooked. The old books' placing of him in Masamune's circle the NBTHK treats with care, allowing the point remains open while holding the Soshu influence on his reform to be plain.
Against his Soshu peers the distinction is drawn by his own grounded traits rather than by theirs. His bright, clear ji and the thrusting *togari-boshi* set him apart, and the recurring institutional verdict that ji and ha run limpid and lucid is the through-line that holds the two registers together as one hand. Within Kyushu the contrast is sharper still, and the sources make it the heart of his importance: where Sairen and Jitsua before him left a sunken, rustic *suguha*, O-Sa's *midare* is the bright unprovincial style that reorients the whole tradition, his pupils and the later Kyushu smiths working in his light. He is, in the plainest terms the record allows, the smith through whom the Soshu manner becomes a Kyushu one.
His is a Sai-jo saku hand by the Fujishiro rating, and the designations bear the standing out: among the works on record are four National Treasures, foremost the 江雪左文字, the Kosetsu Samonji, the only signed tachi of his to survive, with seven Important Cultural Properties and twenty-one at Tokubetsu Juyo besides, some seventy-seven designated works on record in all. The named meibutsu run through the great houses: the Onishi Samonji, held by the Arima lords of Kurume; the 弾正左文字, the Danjo Samonji long treasured by Uesugi Kagekatsu; pieces preserved in the Owari Tokugawa house, where one stood among the highest-graded blades of the collection, in the Date house of Sendai, the Sakai of Himeji, the Tachibana of Yanagawa, the Makino, and the Matsudaira of Shirakawa, one katana having passed through the hands of Hideyoshi himself. For the private collector the position follows from this history. The National Treasures and Important Cultural Properties are heritage held in public and long-private hands, not things that trade; of the rest the Tokubetsu Juyo and Juyo blades, fifty or so across the recorded tiers, are more findable than the works of the very rarest Kamakura names, yet a signed tanto or a securely papered Den Sa katana comes to market only rarely, and is a landmark of a collection when it does.
Phase 2 · Sue-Sa (末左) · 1338 – 1450
When the single character 左 passed from the founder's hand to those of his pupils and sons, the Sa workshop of Chikuzen entered the chapter the sword books gather under the name Sue-Sa. The NBTHK names the line repeatedly: Yasuyoshi, Yukihiro, Yoshisada, Kunihiro, Hiroyuki, Hiroyasu, Sadayoshi, with Kōan and Sadakuni read among them, each said to have taken up the master's manner. The succession is also a dispersal. Yasuyoshi, called a son of O-Sa, carried the style north from Chikuzen into Chōshū (Nagato), where his descendants and the smith Akikuni continued it; Hiroyasu, transmitted as a son of Yukihiro, is recorded as moving later to Aki. The dated work places this phase from the early *Nanbokuchō* years through Shōhei and Eiwa and on into the *Ōei* era of early Muromachi, by which point the Chōshū Yasuyoshi name had clearly passed to a second-generation hand whose pieces the judges separate by signature and workmanship from those of the first.
The inherited idiom is the *Sōshū-den* manner the founder brought from Sagami, read now at a generational remove. The ground stays *itame* mixed with *ko-itame* and *mokume*, the grain standing (*hada-dachi*), carrying thick *ji-nie* and frequent *chikei*, over which the smiths temper a *notare* or *suguha* base mixed with *gunome*, *ko-gunome*, and pointed (*togari*) elements, with *ashi* and *yō* entering, deep *nioi*, thick *ko-nie*, and fine *kinsuji* and *sunagashi* drawn through. The *bōshi* thrusts up (*tsukiage*) to a pointed tip with *hakikake* and a long return, the one trait the setsumei hold to across the whole line. Against the founder, the register shifts. Where O-Sa stands for bright, clear *ji-nie*, the Sue-Sa setsumei more often note a steel of darker, blackish cast and a *nioiguchi* tending toward *shizumi* (subdued). The pattern standardizes: signed work survives chiefly as *tantō*, and the judges remark that a strongly distinct individuality is hard to isolate among them. A Bizen lean enters at the edges, the setsumei reading in Yasuyoshi a *nioi*-dominant temper with *bō-utsuri* near the *ha* that mingles a Bizen character, and noting faint *utsuri* in several Hiroyasu blades.
A collector reads Sue-Sa against the apex through the same two anchors the school is judged by, ground and point, but inverted in emphasis. Because brilliance no longer settles the matter, *gunome* prominence becomes the working key: the Hon'ami house long appraised the most vigorously *midare* blades of the "Sa ichirui" to Kunihiro, and the conspicuous-*gunome mumei* *katana* repeatedly fall to Hiroyasu, while the pointed, brushed *bōshi* with its long *kaeri* keeps the attribution within the line. The named masters anchor the phase, Kunihiro for the boldest large-pattern *midare* enlivened by *yubashiri* and *tobiyaki*, Yasuyoshi for the Bizen-tinged Chōshū work, Sadakuni recorded as a son of Kunihiro whose few surviving *tantō* approach the founder's hand, Kōan and Hiroyasu reaching across into *Ōei*. The provenance threads through the great houses the setsumei cite: the signed Yoshihiro *tachi* from the Bizen Ikeda family, a Sadakuni *tantō* held by the Mōri, Hiroyasu blades transmitted in the Kuroda, Takasu Matsudaira, and Hisamatsu houses, several carrying Hon'ami Kōchū and Kōon *origami*. For the student of *Sōshū-den*, Sue-Sa is the Sagami manner held one step past its Chikuzen height, transmitted, divided across provinces, and carried into the Muromachi age.
Yasuyoshi (安吉) — Mainline · 1346-1370. Jūbun, Jūbi, Tokujū, Jūyō. A tanto dated Shohei 17 (1362) and signed Choshu ju Yasuyoshi (長州住安吉), today a Juyo Bijutsuhin, anchors nearly everything the published sources say about Yasuyoshi of Chikuzen. Its hand is identical to his customary signature, and on that identity rests the account repeated at the head of entry after entry: Yasuyoshi was the son of O-Sa (大左), succeeded him as the second generation of the Samonji line, and later moved from Chikuzen to Nagato. His dated work runs from Shohei 17 into the Joji era. The name did not end with him, for descendants or pupils carried it in Nagato into the early Muromachi period, the line the sources call Choshu-Sa (長州左). Across half a century of designations the NBTHK assigns him one constant character, stated in almost the same words each time: his is the work in which, "within the Sa family a Bizen temperament intermingles" (左一類の中にあって備前気質が混在する).
The signed record has a strict shape. Every signed Yasuyoshi is a wide, sunnobi tanto or ko-wakizashi in hira-zukuri, thin in kasane and shallow in sori, the full mid-Nanbokucho stance; where O-Sa's tanto stay small, his run large. The published sources state plainly that no authenticated signed tachi exists, so his tachi and naginata survive as osuriage mumei attributions. The mei itself is a large two-character signature cut with a somewhat thick chisel below the mekugi-ana at the center of the nakago. On occasion it is prefixed with the character Sa, a form headed by the meibutsu Hitotsuyanagi Yasuyoshi (一柳安吉), an Important Cultural Property. The record is just as exact about an absence: works signed Sa Yasuyoshi (左安吉) and Choshu ju Yasuyoshi both survive, but "one does not see examples signed Chikushu ju Yasuyoshi" (筑州住安吉と銘したものを見ない).
His jigane is an itame that flows and often stands, mixed with mokume, with ji-nie attached. Over it rises a whitish shirake-utsuri, a bo-utsuri, or a sugu-utsuri near the edge, and the published sources name this flowing, standing forging with its whitish cast the viewing point of the smith. The hamon is a shallow ko-notare mixed with gunome, ko-gunome and pointed elements, nioi-dominant with ko-nie. Ashi enter, fine sunagashi runs through, and kinsuji appear here and there. The boshi runs midare-komi or thrusts up in tsukiage fashion, leans slightly toward the edge, and ends pointed with light hakikake and a rather long return. Set against his father the judgment is plain: the brilliance of ji and ha falls short of O-Sa, one early entry stating without ceremony that "his skill as well does not reach his father" (技術も父に及ばない), and the boshi, lacking O-Sa's sharpness, often falls into a leaning tendency. These same qualities form the stated kantei trap. Nioi-dominant with ko-nie set in, his work "at first sight strays among Osafune pieces such as Kanemitsu" (一見兼光などの長船物に紛れる), and the standing utsuri only strengthens the impression.
Two registers complicate the portrait at its edges. A minority of his smallest tanto, nearly O-Sa's own size with a slightly withered fukura, keep close to the master: dust-fine thick ji-nie, fine chikei, at times a nie-utsuri, a bright clear nioiguchi with kinsuji and sunagashi sweeping through, the boshi pointed, a make the published sources call "truly mistakable for O-Sa" (正に大左に見紛う). On the Tokubetsu Juyo tanto signed Sa Yasuyoshi, the character Sa is fluent and close to O-Sa's own hand while the two characters of Yasuyoshi show a somewhat naive chisel; whether such pieces prove the tradition that O-Sa himself signed Yasuyoshi in his last years, or are instead Yasuyoshi's earliest work, the NBTHK leaves open for future study. At the other edge stand the Nagato years. Blades read as the Nanbokucho Choshu Yasuyoshi differ from his usual nioi-dominant hand: ji and ha take nie strongly, the notare grows bold with kuichigai-ba mixing in, sunagashi sweeps with kinsuji entering, and the boshi thrusts up to a point. Oei-dated work is judged plainly a successor generation, while the Eiwa-dated pieces stand unresolved between the founder's last years and a second generation, a question the published sources repeat as a subject for future research.
On unsigned blades of the Sa type his own marks decide the attribution. Where the flowing, standing itame carries a whitish utsuri, where the temper turns nioi-dominant in small patterns, and where the thrusting pointed boshi softens into a lean, the work is likened to Yasuyoshi within the school, and several osuriage katana have been so appraised. The pointed boshi is the Sa-family inheritance he never gives up; the softness of the edge is his own. The recent entries single out "the deep nioiguchi carrying a soft feeling" (柔らか味を帯びた塩相の深い匂口) and the rich activity working inside the ha, finding in them a strength that remains his even where the brilliance does not match his father's.
Fujishiro rates him Jo-jo saku, and the record is unusually legible: forty-five designated works are on record, thirty-six of them signed against seven unsigned. Six blades are Important Cultural Properties, headed by the meibutsu Hitotsuyanagi Yasuyoshi; four are Juyo Bijutsuhin, among them the dated Shohei 17 tanto; and thirty-three stand in the Tokubetsu Juyo and Juyo tiers, one Tokubetsu Juyo wakizashi praised as "the very finest within this smith's work" (同工作中の白眉). Fourteen blades carry recorded provenance: examples passed in the Bizen Ikeda and Inshu Ikeda houses, the Tosa Yamauchi and the Maeda, one tanto certified in the ownership of Tokugawa Iesato, and another treasured by Motoda Nagazane, the Confucian scholar of Kumamoto. Of recorded whereabouts today, blades rest in the Tokugawa Art Museum, the Fukuoka City Museum, the Tokyo National Museum and the Sano Art Museum. The Important Cultural Properties are patrimony and will remain where they are; much of the rest is held by institutions or in long private keeping, and a signed Yasuyoshi coming into open hands is an uncommon event, appearing only rarely and rewarding patience.
Kunihiro (國弘) — Mainline · 1346-1370. Jūbun, Tokujū, Jūyō. A small hira-zukuri tantō, signed Kunihiro saku and dated Shōhei 12 (1357), is the fixed point of his record: from it the published sources read the span of his activity, for signed work by his hand is otherwise scarce. Kunihiro worked in the Chikuzen Sa school, the Samonji line of the Nanbokuchō period, and is transmitted as a son of Yoshihiro or, by another account, of Sadayuki. The published sources place him among the leading hands carried on from Ō-Sa, in a school that, as they put it, emerged in the early Nanbokuchō and cast off the older traditional Kyūshū manner to establish a style in which the steel and temper are 'bright and clear, refined in workmanship' (地刃が明るく冴えて垢抜けした作風). Within that school Yasuyoshi, Yukihiro, Yoshisada, Kunihiro, Hiroyuki, Hiroyasu and Sadayoshi all inherited the master's manner; Kunihiro is the one to whom the boldest, highest-tempered work was assigned.
His characteristic hand is a large-patterned irregular temper led by undulation. The published sources name two manners in his work and describe the first as 'a somewhat large-patterned midareba with notare as the main theme' (のたれを主調としたやや大模様の乱れ刃), into which he sets *gunome*, *ko-gunome*, *ko-notare* and ha with a pointed tendency, the whole tempered high and flamboyant. The *nioi* is deep and the *nie* attaches thickly and unevenly, with coarse *nie* gathering in places; fine *kinsuji* and *sunagashi* spill into the *ji* and run freely, and *yubashiri*-like *tobiyaki* appears frequently. It is the showiest of the Sa-group manners, and the reason it is his: the Hon'ami house, judging Sa-group blades, tended to assign the name Kunihiro to those examples showing 'the most vigorously unsettled midare' (最もさかんに乱れ).
The *jigane* is the constant beneath both manners. It is a standing *itame* mixed with *mokume* and a flowing grain, thick in *ji-nie* with bold *chikei* entering frequently, the steel carrying a somewhat blackish cast. This is the Sōshū-derived *jigane* of the Sa school, open and active, not the bright tight *ko-itame* and *utsuri* of Bizen; where the forging tightens on his smaller signed pieces the *ji-nie* grows fine and the steel brightens. Over it the *bōshi* of the prime work runs into *midare-komi*, thrusts up and ends pointed, with vigorous *hakikake* and a long return, while the quieter pieces run straight to a small round. His second manner, named alongside the first, is a *suguha*-toned temper mixed with *gunome*, calmer and seen chiefly on the *hira-zukuri* tantō and the *sun-nobi* wakizashi.
Most of his surviving record is not signed at all. The Sa school's long Nanbokuchō tachi were shortened in later centuries into katana, and the great majority of blades that carry his name today are *ō-suriage mumei*, wide in body with little taper, shallow in *sori* and large in the *kissaki*, the grand high-Nanbokuchō shape. On these the published sources affirm the Sa school from every point and judge the manner 'most fittingly compared to Kunihiro within the school' (同派の国弘に最も擬せられる), precisely because the tempering is high and large in scale, the *nie* variable, the internal activity abundant and the *yubashiri*-like *tobiyaki* well marked. The signed tantō dated Shōhei 12 anchors the chronology; one signed tachi survives, published in the *Kōzan Oshigata*, and is held to be of high documentary value for the study of the whole line.
What sets him apart is named within his own school rather than against another. The hands of the Sa smiths are so closely matched that individual attribution is difficult, and the published commentary is candid about it: the attribution to Kunihiro rests on the boldness and scale of the workmanship, not on a single personal tell. He is distinguished from his schoolmates by carrying the most flamboyant, highest-tempered *midare* of the group, his bold *yubashiri* and pointed, thrusting *bōshi* the marks the judges look to. The same commentary is honest about his standing within the line, granting that his technique 'falls far short of Ō-Sa' (技術は遠く大左に及ばず); yet on his best small work the refined, bright *ji* and *ha* are found to share 'a continuous affinity with Ō-Sa' (一脈大左に相通ずるものがあって), the kinship that places him among the school's leading hands.
For the collector Kunihiro is a scarce Nanbokuchō name. Fujishiro grades him Jō-jō saku. He has no National Treasures; his record reaches the Important Cultural Property rank in two signed tantō preserved at shrines, one at Kotohira-gū in Kagawa and one at Shinonome Jinja in Ehime, both heritage held in religious keeping. Beyond these, the documented blades run through the higher modern tiers, four at Tokubetsu Jūyō and the rest at Jūyō, with roughly fifty designated works on record in all. Their provenance reaches into the daimyō houses, a katana once held by the Tokugawa shogunal family and a blade transmitted in the Hisamatsu Matsudaira house, with examples now in the Tokugawa Art Museum and the Iwate Prefectural Museum. Signed work is exceptionally rare and the dated tantō a document in itself; of the shortened mumei katana, only a small number fall in the Tokubetsu Jūyō and Jūyō tiers, so a Sa Kunihiro comes to a private collector only seldom, and a signed example rarer still, a tangible record of how the Sa school carried its bright, bold manner into the height of the Nanbokuchō.
Yoshisada (吉貞) — Mainline · 1345-1359. Jūbi, Tokujū, Jūyō. A wakizashi by Yoshisada dated Shōhei 13 (1358), cut on the reverse "ninth month, day" and on the face with the orderer's name "Shu Nagamasa," is the documentary anchor of his career: from it the published sources accept that he was a direct disciple of Ō-Sa, and fix his working years in the middle of the fourteenth century. Yoshisada is a smith of the Sa, or Samonji, school of Chikuzen, one of the *Sa-ichirui* who carried the school's manner forward in the Nanbokuchō period beside Yasuyoshi, Yukihiro, Yoshihiro, Kunihiro and Hiroyasu. He is traditionally held to be "a son of Ō-Sa" (大左の子と伝え), or at least a member of his immediate circle, and he signs simply "Yoshisada" or "Yoshisada saku," a piece additionally cut "Chikushū jū" not being encountered.
His hand is read first through what the published sources allow him as his one personal characteristic. They observe that the smiths of the Sa group show comparatively few individual tells, and then single Yoshisada out: "even within the Sa group his *hamon* becomes a small-patterned design, and in this lies his stylistic individuality" (左一類の中でも刃文が小模様となる点に吉貞の作風上の個性が窺え). That small-scale *midare* is the through-line of his work. Among signed pieces two manners are drawn. One is a calm, shallowly undulating *notare* on a *suguha* base; the other is a *gunome* temper that resembles his schoolmate Yasuyoshi but is worked, in the judges' words, "a little smaller and more compactly than his" (安吉に似てそれよりも少しく小ずむ). In both the *nie* adheres well, with fine *kinsuji* and *sunagashi* running through, the activity carried in *ko-ashi* and *yō* rather than in tall clusters, and the *bōshi* rising with a thrusting tendency to a pointed return.
The *jigane* is the Sōshū-derived steel the whole Sa line shares, and it is the constant beneath both his manners. Over a standing *itame* mixed with *mokume* and a flowing *nagare-hada*, the grain a little open, he lays thick *ji-nie* and well-entered *chikei*, the steel at times taking a darkish cast; on several blades a whitish *shirake*-style *utsuri* drifts in the ji. Against that *jigane* the temper stays comparatively small in scale. Where his quieter pieces run a gentle *notare*, deep in *nioi* and bright, his more active pieces gather the *gunome* into the compact pattern the sources name, with occasional coarser *nie* and, near the *monouchi*, *nie-suji* and *yubashiri*-like *tobiyaki* lending a varied scenery.
The two faces of his record sit side by side. The signed work is chiefly *wakizashi* and *tantō*: the Tokubetsu Jūyō *tantō* transmitted in the Mito Tokugawa house, *hira-zukuri* and wide, with strong *nie* in both *ji* and *ha* and a bright, clear *nioiguchi*, which the published sources call "an especially outstanding piece by this smith" (同工の出色の出来); the dated Shōhei 13 *wakizashi* bearing the orderer's name; and the Mononobe Yoshisada *tachi*, which tempers the *koshimoto* high into a brighter, livelier *midare* and shows how far the same hand could open. The other face is the *ō-suriage mumei* *katana* appraised as his, wide and powerful, several with an extended or large *kissaki*, a *ko-nie gunome-midare* with some *chōji* feeling over the standing itame, a *bō-hi* carved through; the judges note that even these unsigned attributions tend to the same small-patterned *hamon*, so the body of his oeuvre is read through that small *midare* rather than through any single signed tell. One such *katana* carries a gold-inlay attribution to Yoshisada by Hon'ami Mitsunori.
What sets Yoshisada apart within the Sa group is precisely that small-patterned temper. Where Yasuyoshi's *gunome* stands fuller, Yoshisada's is drawn smaller and more compact; where the line as a whole is read as showing few individual features, his compact *midare*, bright *nioiguchi* and pointed, thrusting *bōshi* recur from blade to blade as his own. He belongs to the generation that held the Sa school together after Ō-Sa, neither the founder's brilliance nor a late epigone, but a sound and recognizable hand whose individuality the NBTHK locates in scale rather than in flamboyance.
For the collector he is a documented but uncommon Nanbokuchō name. Fujishiro grades him Jō-jō saku. He has no National Treasures and no Important Cultural Properties; his record runs instead through four Tokubetsu Jūyō and forty-three Jūyō blades, with two *ō-suriage* *katana* holding the prewar Jūyō Bijutsuhin, one of them the Hon'ami Mitsunori gold-inlay piece now in the Seikadō Bunko. His blades carry distinguished provenance: the Mito Tokugawa house, with pieces traced to Tokugawa Ieyasu and Yorifusa, the Mōri family, the Bizen Ikeda family, and the Shimazu and Satake houses, with examples on deposit at the Kyoto National Museum and held in the Seikadō Bunko. The signed work is genuinely scarce, and "surviving examples in *tachi* form are exceedingly rare" (太刀の作例は稀有); most of what survives is held rather than traded, but a Jūyō-tier *mumei* attribution or, less often, a signed *wakizashi* or *tantō* comes to light from time to time, and a privately held Yoshisada is a rewarding thing for a collector to encounter, a clear document of how the Sa school read in the hands that carried it after its master.
Hiroyasu (弘安) — Mainline · 1346-1370. Jūbi, Tokujū, Jūyō. Hiroyasu is a smith of the Chikuzen Sa school, the Samonji line of the Nanbokuchō period, his active years fixed by two dated pieces, a tantō of Shōhei 20 and one recorded in the Umetada Oshigata of Shōhei 13. The published sources transmit him as a son, or by another account a pupil, of Yukihiro, and place him among the smiths carried on from Ō-Sa, the group broadly called the Sue-Sa. By the Nanbokuchō period the Sa school had emerged in Chikuzen and, casting off the older and somewhat rustic Kyūshū manner, taken in the Sōshū tradition to establish a style in which both ji and ha are bright and clear and run with chikei and kinsuji. Tradition adds that Hiroyasu later moved to Aki. Signed work survives only as hira-zukuri sun-nobi tantō and small wakizashi, signed tachi being unknown to the judges, so very nearly his whole katana record is ō-suriage and mumei, drawn from long Nanbokuchō tachi and naginata cut down into uchigatana, the attribution carried by the workmanship rather than by a name on the tang.
The feature that fixes his name is the gunome on his edge. Among the mumei blades the Hon'ami house judged within the Sa group, it was the ones in which gunome stands out conspicuously that were appraised to Hiroyasu, and the published sources put the point plainly, that among blades seen as the Sa lineage 「特に互の目の目立つものがよく見受けられる」, those in which the gunome is especially prominent are often encountered. His temper is a midare led by notare into which gunome, ko-gunome, ko-chōji and a little pointed-ha enter, the whole kept comparatively small in scale rather than gathered into towering clusters. Ashi and yō run well into it, the nie lies thick and a little uneven with coarse nie in places, and sunagashi runs frequently with kinsuji threading the line. Small yubashiri-like tobiyaki touch the edge here and there, an activity the judges find archaic and full of spirit. The bōshi runs midare-komi, thrusts up and ends pointed with vigorous hakikake and a deep return.
The jigane is the Sōshū-derived ji the whole school shares, and on Hiroyasu it stands open. It is an itame mixed with mokume, flowing grain and patches of large itame, the surface standing out rather than lying tight, with thick ji-nie and chikei entering finely and densely, the steel taking on a faintly blackish cast. This is the dark, active jigane of the Sa hands, not the bright tight ko-itame and midare-utsuri of Bizen; at most a thin nie-utsuri-like effect rises in the ji. The judges prize the clarity of the best of it, noting on one fine katana that the steel shows no cloudiness and no whitish dullness whatever, 「鉄の濁りや白気がいささかもなく」, while the nie lies thick and the line is bright. Over so dark and lively a ji the small-patterned gunome reads as the quieter, more intimate face of the grand Sōshū idiom the school had only lately taken up.
Within his own record the published sources draw a second manner alongside the first. Some of his work, and especially the pieces tradition has long called Hiroyasu, runs a calmer line, suguha-toned and somewhat compact, the nioiguchi taking a subdued, shizumi cast. From olden times appraisals to him were assigned to Sa-group blades showing a gently undulating midare grown somewhat small, of which the judges write that it 「やや小ずむところに少異がある」, that it differs slightly in being a touch compact. This subdued register sits on certain shortened katana and on the small signed work, the hira-zukuri sun-nobi wakizashi and tantō, where the gunome of the showy manner is muted and the calm line itself becomes the tell. The two faces are not phases of a career but two readings the school's connoisseurship has fixed to his name, the conspicuous gunome on the one hand and the compact, subdued midare on the other.
What sets him within the Sa school is what the judges candidly will not claim for him. Theirs is a lineage whose hands are so closely matched that individual judgment is very difficult, and the published sources grant that no single feature singles Hiroyasu out and that his skill is held to fall short of Yasuyoshi, the strongest of the group. He is distinguished instead by his own affirmed traits, the standing, blackish itame thick in chikei that marks the Sa jigane apart from Bizen, the prominent gunome the Hon'ami house reserved to his name, and the thrusting, pointed bōshi with its hakikake. He stands beside Yukihiro, Yasuyoshi, Yoshisada, Kunihiro, Hiroyuki and Sadayoshi as one of the smiths who carried the Sa manner forward from Ō-Sa into the later fourteenth century, and his blades, where the nie is thick and the tobiyaki touches the edge, keep something of the archaic flavor the judges call 「古雅な趣を醸し出している」.
For the collector Hiroyasu is an attainable name among the Sue-Sa, where Ō-Sa himself is not. Fujishiro grades him Jō saku. He has no National Treasures and no Important Cultural Properties; his record runs instead through three katana at the Tokubetsu Jūyō rank, two katana recognized before the war as Jūyō Bijutsuhin, and some nineteen blades at the Jūyō rank, several carrying old Hon'ami origami by Kōon, Kōchū and Mitsutada that document the long history of his attribution. His blades passed through daimyō and collector hands, the Kuroda, the Hisamatsu-Matsudaira, the Takasu-Matsudaira and other Matsudaira houses among the recorded provenances, with one Jūyō Bijutsuhin katana now in the Sano Art Museum. About twenty-two blades fall in the Tokubetsu Jūyō and Jūyō tiers, so a Hiroyasu comes to light from time to time rather than rarely, and a signed wakizashi or tantō, of which the judges note signed work is extremely few, is the more notable thing for a collector to encounter, valued as much for the study of the Sa group as a whole as for itself.
Yukihiro (行弘) — Mainline · 1350-1352. Kokuhō, Tokujū, Jūyō. Yukihiro is a smith of the Chikuzen Sa school of the early Nanbokuchō period, and the one fixed point in a lineage otherwise short of dates: the published sources call him 'the smith whose extant dated work is the earliest and whose workmanship approaches Sa most closely' (現存する年紀が最も古く、且つ作柄が極めて左文字に接近している刀工が行弘である). His activity is anchored by a tantō dated Kannō 1 (1350), held a National Treasure and said to display workmanship that calls Ō-Sa himself to mind. The Sa school had emerged a generation before, casting off the older classical Kyūshū manner to establish a style in which both *ji* and *ha* are bright and clear; Yukihiro, transmitted as Ō-Sa's leading pupil and by one account his son, is the smith the judges set nearest the master's own hand.
His recognized work is the small tantō, and its temper is the tell. Over the *jigane* he draws a shallow *notare* mixed with *gunome* and *ko-gunome*, with *ashi* and *yō* entering, in places *kuichigai-ba* and *nijūba*. The *nioi* is deep and *ko-nie* adheres thickly; fine *kinsuji* and *sunagashi* run well throughout, and the *nioiguchi* is bright and clear. The *bōshi* gives him away most plainly: it runs into a *notare-komi*, thrusts up, ends pointed with *hakikake*, and on the finest pieces the *kaeri* is tempered down long, at times meeting *muneyaki* along the back. This is the Sōshū-derived line of the Sa house, not the clove-flower of Bizen, and on Yukihiro it stays comparatively quiet, the activity carried in *nie* rather than in towering clusters.
The *jigane* is the constant, and where the published sources find him closest to the master. His is a well-knit *itame*, at times a *ko-itame* mixed with *mokume*, the grain standing somewhat, with dust-fine *ji-nie* laid thickly and *chikei* entering finely and frequently, the steel bright and clear. A *nie-utsuri* stands along the *ha* rather than the speckled reflection of old Bizen. On his best tantō the *jihada* tightens into a refined *ko-itame* of dust-fine *ji-nie* and intricately woven *chikei*, the manner the judges call most fitting to his hand, set apart from the boldly standing, more open *itame* the school assigns to his fellow pupil Kunihiro.
Because no long signed blade survives, his record in *tachi* length is carried by the *naginata* and *katana* attributed to him, whether by Hon'ami *kinzogan* or held as *den*. These are wider, with a standing *itame* running toward *masame* in places, *ji-nie* and an *utsuri* present, and a temper a touch broader and calmer than the tantō, a *ko-midare* or shallow *ko-notare*-flavored *gunome-midare* with *yubashiri* and the same pointed *midare-komi bōshi*. From the rare tantō signed 'Chikushū-jū Sa', whose chisel work matches his own, the published sources now infer 'the possibility that among works bearing the Sa signature there are pieces made or signed on another's behalf by Yukihiro' (行弘の代作・代銘が含まれている可能性). It is a connoisseur's question that follows directly from how near his hand runs to the master's.
What the judges name as his distinction is exactly that nearness. Within a school whose hands are so closely matched that attribution rests on the boldness of the work rather than a single personal feature, Yukihiro is set apart not by flamboyance but by refinement: the brightest, most thickly *nie*-laden *ji* and *ha*, 'exceptional surviving examples that display workmanship virtually identical to Sa himself' (左文字宛らの出来映えを示した出色の遺例). His pointed, thrusting *bōshi* and the deep clear *nioiguchi* are the Sa-group features pronounced on his blades; on the finest of his *mumei* tantō the published commentary judges that 'it shows a manner connecting in a single stream to Great Sa' (一脈大左に通ずる出来口) and that 'appraising it specifically as Yukihiro is the most appropriate conclusion' (行弘と鑑するのが最も至当). He is the disciple in whom the master's own hand is most nearly read.
For the collector he is a rare and exacting name. Fujishiro grades him Jō saku. His one *tachi*-length National Treasure aside, his record runs through the Important Cultural Property rank and the Tokubetsu Jūyō and Jūyō tiers, where ten of his blades sit, several of them *mumei* tantō judged the most fitting attributions to his hand. Provenance gathers around great houses: the *kinzogan* *naginata* by Hon'ami Kōtoku descends in the Kii Asano family, paired there with the *meibutsu tachi* 'Ō-Mihara', while his blades also pass through the Tokugawa and Yanagisawa houses and are today held at institutions including the Tsuchiura City Museum and the Gotoh Museum. Signed work is limited to a few small tantō, and long signed blades do not survive at all, so a privately held Yukihiro reaches the market only seldom and is a landmark when it does. It is not wholly beyond reach in the way the National Treasure tantō is, but for a smith the published sources place this close to Ō-Sa, a signed or finely attributed example is among the more notable things a collector of Sōshū work could hope to encounter.
Hiroyuki (弘行) — Mainline · 1346-1370. Jūbi, Tokujū, Jūyō. Hiroyuki is a smith of the Chikuzen Sa school, the Samonji lineage, working in the mid-Nanbokucho period around the Shohei era, and transmitted as a son of Yukihiro. He belongs to the group of followers the published sources call Sue-Sa, the smiths carried on from O-Sa after the school's founder. The Sa school emerged in the early Nanbokucho and broke decisively with the older Kyushu manner, in which the *ji* and *ha* are subdued and rustic in a restrained *suguha*; drawing on the Soshu tradition it established a style in which both *ji* and *ha* are bright and clear, with *chikei* and *kinsuji* intermingled. Hiroyuki worked within that style, and his place is fixed by the few dated and signed records the swordbooks preserve: a work said to bear a Shohei 20 date of 1365, against his father Yukihiro's piece of the Koan years. Signed work by his hand is extremely rare, so almost his whole surviving record is the *o-suriage mumei* katana, attributed to him from long Nanbokucho tachi later shortened.
His recognized hand is read most clearly in the temper. Over a wide, shallow-curved blade he forges a line based on *suguha* that carries a shallow *notare*, into which *gunome*, angular *gunome*, *ko-notare*, pointed *ha* and *ko-gunome* enter, often in a continuous, linked succession kept comparatively small in scale. The *nie* lies thick and uneven, with coarse *nie* gathering in clusters, *uchi-noke* and *yubashiri* touching the edge, and *kinsuji* and *sunagashi* running vigorously through it, the *nioiguchi* often taking a subdued, *shizumi* cast. What the published sources name as his tell is precisely this manner: among the Sa group, whose hands are so closely matched that the individual smith is hard to single out, it is the blade whose *gunome* stands out and runs continuously, and whose temper is comparatively restrained, the rises and falls not standing out strongly, that is read as Hiroyuki. Several of his entries close on the same judgment, that the work is the one 「弘行に最も擬せられるものであり」, most readily likened to Hiroyuki.
The *jigane* is the constant beneath both faces of his work. He forges a standing *itame* mixed with *mokume* and flowing grain, with patches of large *itame* in places, thickly covered in *ji-nie*, *chikei* entering well, the steel taking a somewhat blackish, whitish-misty cast. This is the Soshu-derived Sa *jigane*, an open, *nie*-laden steel rather than the bright, tightly packed Bizen *jigane* with its clear *utsuri*; where a reflection appears at all it is only a faint *nie-utsuri* or a whitish tendency. Beside the *gunome*-prominent line the published sources read a quieter register of the same hand, a *chu-suguha* with only a shallow *notare*, *ko-gunome* and angular elements entering sparingly, the pattern small, fine *hotsure* along the *habuchi*, and the *nioiguchi* subdued. The *boshi* in his bolder work runs *midare-komi*, thrusts up and ends pointed with vigorous *hakikake*; in the calmer register it runs straight to a *ko-maru*.
The two registers answer to how the blade was authenticated. The bold, *gunome*-prominent katana carry the school's spirited character, one Tokubetsu Juyo described as a 「放胆で覇気に溢れた出来口」, a bold and spirited workmanship. The quieter *chu-suguha* pieces, several bearing gold-powder attributions added by the Hon'ami house, show the wide *suguha* with *hotsure* and the subdued *nioiguchi* the appraisers long read as Hiroyuki. The published sources are candid about the limits of this judgment. They class him among the Sue-Sa, of whom they say that 「作風を区別することは困難である」, that distinguishing the styles of the individual smiths is difficult, and they note that the gold-powder attributions seen on his blades are a Meiji-and-later practice begun by the Hon'ami family. Of one such piece they grant openly that there is a question 「左弘行とまで断定し得るか否か」, whether it can be fixed conclusively as Sa Hiroyuki, while affirming that 「南北朝期の左の一派の作であることには異論がない」, that there is no dissent it is the work of the Nanbokucho Sa school.
What sets Hiroyuki apart is therefore a matter of degree within a closely matched school rather than a private signature. His own evidenced tells, the continuous *gunome* in a small-patterned, *suguha*-leaning temper, the standing *itame* with its blackish *nie*-laden steel, and the thrusting, pointed *boshi*, place him beside Yasuyoshi, Yukihiro, Yoshisada, Kunihiro, Hiroyasu and Sadayoshi, the Sue-Sa hands carried on from O-Sa. The published sources hold his skill within that company and affirm his *mumei* attributions from era and school, naming his comparatively calm, suguha-leaning manner as the side of the Sa tradition that bears his name. He stands one generation below the founder, working the grand Nanbokucho form in the school's bright, *nie*-rich idiom rather than reaching for the flamboyance of its first masters.
For the collector Hiroyuki is a documented Sa name carried at the higher modern designation tiers. Fujishiro grades him Jo saku. His record runs through two Tokubetsu Juyo katana, one of them carrying a Hon'ami Ringa gold-powder mei, two prewar Juyo Bijutsuhin, and some twenty-nine blades at the Juyo rank, thirty-one in the Tokubetsu Juyo and Juyo tiers together. His blades are rooted in daimyo provenance, the Ii family of Hikone, whose maru-ni-tachibana mounting accompanies one Tokubetsu Juyo, and the Nabeshima family, with further pieces passing through the Tsuchiya house of Tsuchiura and the Tokugawa, and one preserved in a municipal museum collection. Because almost his entire record is *mumei* and held in long-standing collections, a Hiroyuki seldom comes to market; when one does appear it is from the Juyo and Tokubetsu Juyo tiers, and the patient collector may encounter such a blade from time to time, a sound and forceful document of how the Sa school carried its bright Soshu manner into the second Nanbokucho generation.
Sadayoshi (貞吉) — Mainline · 1345-1350. Jūbun, Jūyō. Sadayoshi is a smith of the Chikuzen Sa school, the line of Samonji, working in the middle of the Nanbokuchō period. The published sources place him among the Sue-Sa, the second wave of pupils who carried the school forward after Ō-Sa: "Sadayoshi is said to have been the son of Yasuyoshi and is traditionally placed among the smiths active around the Bunna era" (貞吉は安吉の子で、文和頃の刀工と伝えており). Yasuyoshi was himself a son of Samonji, so Sadayoshi sits two generations down from the founder, in the company the commentary names together time and again, Yasuyoshi, Yukihiro, Yoshisada, Kunihiro, Hiroyuki, Hiroyasu and Sadayoshi. The Chikuzen Sa school had emerged in the early Nanbokuchō and broken decisively from the older, classical Kyūshū manner, establishing a new style in which both *jigane* and *hamon* are bright and clear and in which *chikei* and *kinsuji* stand out; Sadayoshi is one of the heirs who forged in that idiom.
The central fact of his record is its near-total reliance on attribution. The published sources state plainly that "extant signed works are extremely few" (現存する在銘作は極めて少ない), and almost everything that survives under his name is the *ō-suriage*, *mumei* katana judged to him. What allows the judges to single him out of the school is one feature, and the commentary names it without hesitation: a calm, *suguha*-based temper. They observe that "among unsigned blades appraised to the Sa group, one frequently encounters pieces whose tempering is founded on *suguha*" (無銘極めの刀には、左一類と見えて直刃を基調とした刃取りのものがよく見受けられる), and it is this restrained manner, long held the key point in appraising his work, that resolves a Sa-group blade specifically to Sadayoshi. On one katana the appraisal is put as simply as it can be, that "because the overall impression is comparatively gentle and quiet, it is reasonable to determine the attribution to Sadayoshi" (比較的におだやかにおとなしい点からであろう貞吉と極めているが妥当である).
The *jigane* is the Sōshū-derived steel he shares with the whole Sa line. He forges a standing *itame*, mixed with *mokume* and a flowing *nagare-hada*, the grain conspicuous and at times opening; over it the *ji-nie* lies thick and the *chikei* enter frequently, the steel inclining at times toward a dark tone, and on several blades a faint, whitish *utsuri* rises along the *shinogi*. Above the *jigane* the temper is a wide *suguha* or *chū-suguha* with a shallow *notare*, into which a little *gunome* and *ko-gunome* are mixed; *ashi* and *yō* enter, *kinsuji* and *sunagashi* run, the *nie* gathers thickly, and the *nioiguchi* at times tends to subside. The *bōshi* is the school's constant and his most reliable structural tell, rising with a thrusting *tsukiage* tendency to a sharply pointed tip and swept with *hakikake*, the feature the judges repeatedly call typical of the Sa lineage. A *bō-hi* is generally carved through.
Within that one *suguha*-led manner the attributions divide into a quieter and a more animated register. At its calmest the line is a wide *suguha* barely undulating, the activity carried in *ashi* and *yō* and in fine *kinsuji* rather than in any tall pattern. In a number of blades the same foundation opens out: the *yakihaba* widens, the line takes a *ko-notare* with *gunome* and angular elements, the *nie* thickens and grows uneven with coarser grains, *hotsure* frays the edge, *uchi-noke* and a *nijūba*-like doubling appear, and *yubashiri* or small *tobiyaki* collect near the *monouchi*. Even at its most active the body of the temper stays *suguha*, and the pointed, swept *bōshi* holds, so the reading remains Sa-group work given to Sadayoshi. The published sources judge several of these especially well made among works attributed to the smith, the broad *yakihaba* and abundant *nie* lending a powerful, splendid impression in concert with the bold Nanbokuchō shape. The blades are wide-bodied with little taper and an extended *chū-kissaki* or *ō-kissaki*, several refashioned from *naginata*, and a handful carry a later cutting inscription in gold inlay or, in one case, only a red-lacquer character on the tang, which the judges read not as the founder's name in the narrow sense but as a mark of the Sa group as a whole.
What distinguishes Sadayoshi within his own school is exactly the thing that makes him hard to find. The commentary reads the Sa group as a line of comparatively few individual features, the smiths so close in hand that their unsigned work is hard to separate; against that, his calm *suguha* and his pointed, swept *bōshi* are what carry a blade to his name rather than to a brother's. His bright, *chikei*-laden *jigane* and the *suguha*-toned edge set him apart from the more flamboyant *gunome* and *notare* of the wider Sa circle, and his is read as the quiet, classical face of the late school, the manner in which the Sōshū inheritance is held in restraint.
Fujishiro grades Sadayoshi Jō-jō saku, and his standing in the *Tōkō Taikan* is recorded at the middle rank. He has no National Treasures, and his record runs entirely through the modern designation tiers: a substantial body of his attributed katana, more than twenty, has reached the Jūyō rank across more than a dozen sessions of shinsa, several of them judged especially fine among works given to the smith. Provenance is thin in the published record; of recorded whereabouts one blade is held by the Kurokawa Institute of Ancient Cultures, the rest passing through private hands. Because a reliably signed Sadayoshi is among the rarest things in the late Sa record, the collector encounters him almost always through these unsigned, shortened katana, and even those come to market only from time to time and with patience. A blade securely papered as Sa Sadayoshi is not beyond reach in the way a National Treasure is, but it is a quiet, considered acquisition, valued less for a famous name than for the calm *suguha* hand by which the judges still know him.
Kunitada (國忠) — Mainline · 1429-1441. Jūbun. Smith of the Chikuzen Sa School.
Yoshihiro (吉弘) — Mainline · 1346-1370. Tokujū, Jūyō. Sa Yoshihiro is recorded in the reference works on sword signatures, with an example bearing a date of Shohei 23 (1368), and he is traditionally said to have been the son of O-Sa (Yukihiro). He was active during the Nanbokucho period as part of a broad lineage descending from Dai-Sa, among whose disciples and successor smiths there were in fact quite a few. Within that group, however, signed examples are not many; those known to bear signatures include Yasuyoshihiro, Yukihiro, Kunihiro, Hiroyasu, Yoshisada, Yoshihiro, and Hiroyoshi. Even so, the great majority of signed works are limited to *tanto* and *wakizashi*, and signed *tachi* are exceedingly rare, owing to the prevailing fashion of the period for large *odachi* of over three *shaku* in length, many of which were later shortened and converted into *uchigatana*.
The workmanship commonly shared by the Sa group includes a forging pattern of flowing *itame* in *ko-itame-hada*, tightly forged, with fine dense *ji-nie* accumulating thickly, and *chikei* appearing. The tempering exhibits a dominant tone of gentle undulation with an *urumi* (moist, soft) quality, into which *gunome*, *ko-midare*, and *choji* are intermingled. *Sunagashi* runs throughout and *kinsuji* appear, while *ashi* and *yo* enter frequently. The *nioiguchi* is clear, with strongly manifest *nie* and *ko-nie* adhering well, at times mixed with *ara-nie*. The *boshi* characteristically enters in a *midare-komi* manner, showing a *tsukiage* tendency that rises to a pointed impression before turning back. Works attributed to Yoshihiro display this full constellation of Sa-school hallmarks: wide *mihaba*, shallow *sori*, and extended *o-kissaki* that clearly exhibit the characteristic features of the Nanbokucho period.
The smiths of this lineage were broadly comparable in skill, and their styles do not differ greatly, making discrimination among them on a case-by-case basis difficult. Notwithstanding this, the NBTHK has consistently recognized that works transmitted as Sa Yoshihiro exhibit the distinctive traits of the group with particular strength, and that their *jigane* and *hamon* are *kenzen* (sound and well-preserved). The tradition of attribution to Yoshihiro has been accepted as reasonable on the basis of both period and manner of workmanship. Within the larger Sa school, Yoshihiro's works stand as representative examples of the group's achievement, embodying the refined Soshu-influenced forging and tempering idiom that defined the Chikuzen swordmaking tradition at its height.
Sadakuni (貞國) — Mainline · 1362-1368. Tokujū. Smith of the Chikuzen Sa School.
Other smiths
Akikuni (顯國) — Mainline · 1394-1428. Akikuni is the Nagato continuation of the Samonji line. The published sources place him among the later disciples of Sa Yasuyoshi, taken on after Yasuyoshi carried the Sa name out of Chikuzen and into Chochu, and the reference works on signatures add that he was the son of Chochu Yasuyoshi. The same works caution that the name is not quite a single man: they list six smiths who bore it, beginning with a smith of the Bunwa era in the line of Sa Yasuyoshi and including the Oei-period hand described as the son of Chochu Yasuyoshi, so that Chochu Akikuni is best read as a name handed down through the Nagato workshop. Among his extant dated works the earliest are of the Oei era, with later examples reaching into the Bunan years, which sets him in the early Muromachi period carrying a provincial, late reading of the Soshu manner the Sa line had taken up.
The published sources state his temper in a single sentence of connoisseurship, that his work includes both blades in suguha and blades in which nie develops strongly and a linked gunome-midare is formed (彼の作風には直刃のものと、沸づいて互の目乱れが連れたものがある). The latter is the manner they call representative. On his tachi dated Oei 31 the gunome-midare runs linked, with ashi entering and the nie adhering, and on the signed wakizashi the same temper carries small notare, a deep nioi, with sunagashi and kinsuji drawn through. The suguha manner appears in its fuller form on his broadest katana, a chu-suguha base bearing a slight notare with gunome and ko-gunome, ko-ashi and yo entering, the ko-nie uneven in places with slight hotsure and small yubashiri, kinsuji and sunagashi present, the nioiguchi tending to sink. The boshi answers the temper face by face: straight into a ko-maru with a long return finely swept in hakikake on the suguha piece, midare-komi turning back with a pointed tendency on the mumei katana, and on the Oei 31 tachi yaki-kuzure on one face with a straight o-maru on the other.
The jigane is itame, often standing, mixed with mokume and nagare-hada, with thick ji-nie and fine chikei-like lines of steel. On his broadest katana a faint shirake-utsuri stands and the steel carries a slightly blackish cast, the marks of a peripheral late-Sa forge rather than the bright Chikuzen ji. Bo-hi are carved on both faces, at times with companion grooves running partway up the blade. Of that broadest katana the published sources write that there is a rustic character to the workmanship which, with the large kissaki, conveys a vigorous, commanding spirit (総じて作域に野趣があり、大鋒の形状と相俟って、覇気が感ぜられる), and they note that large-scale blades of this kind are scarce within his oeuvre, its imposing form resembling that of an orikaeshi-mei katana by the same smith certified before the war as an Important Art Object.
The signature itself is part of the kantei. Signed works are comparatively few, the standard mei cut in five characters as Chochu-ju Akikuni (長州住顕国), and among the Oei-dated examples some add the title Saemon no Jo (左衛門尉) while others state the place of residence as Chochu Setozaki junin (長州瀬戸崎住人). One katana carries the mei folded over on a shortened tang, an orikaeshi-mei (折返銘), the omote groove carried through into the folded portion. Because the reference works gather several Akikuni under the one name, a date and a place-name in the inscription do as much to anchor a piece as the manner of the temper. His tachi of Oei 31 is valued by the published sources for exactly this reason, the representative example of his connected gunome-midare in which his characteristic features are readily seen, both ji and ha well executed, the Oei date itself prized as documentary material (この太刀はその後者の代表的な作で、彼の特色がよく見られ、地刃の出来がよく、応永年紀は資料的に貴重である).
The lineage to Sa Yasuyoshi is the axis on which his attributions turn, and the published sources argue it from both sides. On a mumei katana shaped like a shortened Nanbokucho tachi they concede that the workmanship does not connect directly to Yasuyoshi's own style, yet accept the handed-down attribution all the same (安吉に直結する作風ではないが所伝を認めることができる). On the signed wakizashi they read the positive case, finding in both the jihada and the hamon a current of workmanship descending from Yasuyoshi (地刃に安吉からの流れが窺える). Taken together the two readings place Akikuni at the provincial far end of the Sa tradition, carrying the Samonji manner into Nagato and into the early Muromachi period with a coarser, more nie-driven character than the Chikuzen source.
Akikuni is a smith of the standing the collector meets through his designated blades rather than his name. Fujishiro grades him Jo saku, and his record on the books is four works at the Juyo level, none raised to the higher designations, a profile that fits a fine provincial hand of the Sa descent. Provenance, where it survives, is fitting to that reading: his work descended in the great houses of his own province, the Ouchi of Suo and Nagato and the Mori who succeeded them, a transmission that reads like the local history of the blade. Recorded ownership beyond that is thin, as it usually is for a smith of this rank, and no museum holding can be claimed from the record. A signed and dated Akikuni is not a blade that comes often to market, and when one does it is met as the work of a well-documented branch smith of the Sa line, a vigorous early-Muromachi piece carrying the Samonji descent into Nagato, valuable to the student of the school for the directness with which it shows a country forge working in the old tradition.
Sadahiro (貞弘) — Mainline · 1368-1375. Smith of the Chikuzen Sa School.
Sadayuki (定行) — Mainline · 1350-1352. Sadayuki belonged to the Sa school of Chikuzen Province, a lineage that emerged in the early Nanbokucho period and broke decisively from the classical styles previously characteristic of Kyushu workmanship. Traditionally regarded as a student of Yukihiro, with an alternative transmission placing him under Yasuyoshi, Sadayuki is recorded with an extant date of Shohei 12 (1357) in the *Umetada Oshigata*, placing his activity squarely at the zenith of the Nanbokucho period. One theory holds that he later relocated to Aki Province. Signed works are few, and the overwhelming majority of attributions rely on *kinzogan-mei* appraisals, including examples authenticated by Hon'ami Koshitsu.
The designated pieces exhibit the unmistakable technical vocabulary of the Sa lineage in both *jihada* and *hamon*. The forging shows *itame* mixed with *mokume* and *nagare-hada*, with fine *hada-dachi*, thickly applied *ji-nie*, and abundant *chikei*, producing a bright and luminous *jigane*. The *hamon* is characteristically founded on a shallow *ko-notare* mixed with *gunome*, *ko-gunome*, and *togariba*, with strongly adhering *nie* and frequent *hataraki* including *kinsuji*, *sunagashi*, and intermittent *yubashiri* at the *yakigashira*. The *boshi* enters *midare-komi* and turns back with a pointed tendency, often showing *hakikake*. Where the *nie* is particularly thick, *nie-kuzure* appears along the *habuchi*, lending the temper a vigorous and expressive character.
Sadayuki's works preserve the heroic proportions of their era: wide *mihaba*, extended *chu-kissaki*, and generous *hiraniku* in the long blades, and *sunnobi* *hira-zukuri* forms in the shorter pieces. Both *ji* and *ha* are consistently bright and clear, confirming the Sa school's refined sensibility, and the sound condition of these blades attests to the enduring quality of Sadayuki's forge craft.
Yasuyoshi (安吉) — Mainline · 1394-1428. Yasuyoshi, the son of O-Sa, succeeded as the second generation of the Sa lineage and is traditionally said to have moved from Chikuzen to Choshu (Nagato Province). This account is supported by an extant tanto dated Shohei 17 (1362) bearing the inscription "Choshu-ju Yasuyoshi," whose manner of signing matches his usual style. Subsequent works explicitly stating "Choshu Yasuyoshi" include examples dated to the Eiwa and Oei eras. The Oei-dated pieces are judged to be by a successor generation on the basis of workmanship and signature style, while whether the Eiwa-dated works represent late production by the first generation or early work by a successor remains a subject for future research. Descendants and students continued the Yasuyoshi name for several generations from the late Nanbokucho through the early Muromachi period, collectively known as "Choshu Sa."
In the forge, Yasuyoshi's work typically displays *itame-hada* mixed with *mokume* and *nagare-hada*, with the grain sometimes standing and *ji-nie* adhering. A whitish *shirake-utsuri* is a hallmark of the school, and tightly forged pieces show extremely fine *ji-nie* with delicate *chikei* and clear steel. The *hamon* most characteristically takes the form of shallow *ko-notare* mixed with *gunome*, with *ashi* entering and a *nioiguchi* that is bright and clear. The temper is primarily *nioi*-dominant with *ko-nie*, accompanied by fine *kinsuji* and *sunagashi*. The *boshi* typically enters in *midare-komi* with a pointed tendency and a long *kaeri*. Compared with O-Sa, the setsumei consistently note that Yasuyoshi's work does not exhibit the same degree of brilliance in both *jigane* and temper, though certain pieces with strong *nie* and *kuichigai-ba* demonstrate a broader range within his oeuvre.
Yasuyoshi's blades are generally of larger and more imposing *sugata* than those of his father, with wide *mihaba* and thin *kasane*. Among his finer works, the forging is well-refined and compact, with the Sa school's characteristic features clearly retained. Pieces of distinguished provenance, including examples transmitted in the Inshu Ikeda and Maeda collections, attest to the esteem in which his work has long been held.
Akikuni (顯國) — Mainline · 1368-1375. Akikuni (顯國), second generation, worked in Nagato Province (Choshu) during the Oan era (1368-1375) and is transmitted as a disciple from after Sa Yasuyoshi relocated to Choshu. Reference works on signatures list six smiths of this same name, beginning with a smith of the Bunwa era said to have belonged to the Sa Yasuyoshi lineage, and continuing through a smith described as the son of Choshu Yasuyoshi who was active around the Oei era. The earliest extant dated works bear *nenki* from the Oei period, and later examples dated Bun'an are also recorded. Among the Oei-dated group, some pieces carry the title "Saemon no Jo," while others explicitly state the place of residence as "Choshu Setozaki junin." Signed works are comparatively few, lending particular documentary value to surviving examples. Fujishiro rates this smith *jo saku*.
Akikuni's manner of working encompasses several distinct modes: blades in *suguha*, works mixing small *notare* and *gunome*, and *midareba* in which *gunome* runs in a continuous, connected pattern (described as *tsure-gokoro*). The *kitae* characteristically shows *itame-hada* mixed with *mokume* and *nagare-hada*, often tending toward *hada-dachi*, with dense *ji-nie* and fine *chikei*-like lines of steel. A faint whitish *utsuri*-like effect or *shirake-utsuri* frequently appears, and the ground steel often shows a somewhat dark, iron-like tone. In the *hamon*, *nie* adheres well, with *hotsure*, *kinsuji*, and *sunagashi* running prominently. The *nioiguchi* tends to show a *shizumi* character. Overall, the workmanship conveys a rustic (*yashu*) and vigorous quality rooted in the Sa school tradition.
Akikuni occupies a noteworthy position among the swordsmiths of the Choshu Yasuyoshi group, preserving a current of workmanship descending from Sa Yasuyoshi while displaying an independent, robust character. The range of surviving work spans both restrained *suguha* compositions and powerful *gunome-midare* pieces of commanding presence, and large-scale blades within the oeuvre are scarce, making such examples especially valuable for understanding the chronology of production. Both *jihada* and *hamon* in the finest examples are *kenzen*, and the abundant internal activities -- *ashi*, *sunagashi*, and *kinsuji* emerging distinctly within the temper -- attest to accomplished skill. As a smith whose signed works remain rare, each surviving piece carries considerable importance as reference material for the study of the Choshu school.
Akikuni (顯國) — Mainline · 1558-1570. Smith of the Chikuzen Sa School.
Haruakira (治劍) — Mainline · 1346-1370. Smith of the Chikuzen Sa School.
Hiroyoshi (弘吉) — Mainline · 1345-1350. Smith of the Chikuzen Sa School.
Morihiro (盛廣) — Mainline · 1334-1338. Smith of the Chikuzen Sa School.
Morisada (守貞) — Mainline · 1492-1501. Smith of the Chikuzen Sa School.
Moriyoshi (盛吉) — Mainline · 1368-1375. Smith of the Chikuzen Sa School.
Sadaaki (貞秋) — Mainline · 1394-1428. Smith of the Chikuzen Sa School.
Sadakiyo (貞清) — Mainline. Smith of the Chikuzen Sa School.
Yasuyoshi (安吉) — Mainline · 1379-1384. Smith of the Chikuzen Sa School.
Yasuyoshi (安吉) — Mainline · 1469-1487. Smith of the Chikuzen Sa School.
Yasuyuki (安行) — Mainline · 1312-1317. Smith of the Chikuzen Sa School.
Yasuyuki (安行) — Mainline · 1345-1350. Smith of the Chikuzen Sa School.
Yukiaki (行觀) — Mainline · 1356-1361. Smith of the Chikuzen Sa School.
Yukisue (行末) — Mainline · 1352-1356. Smith of the Chikuzen Sa School.
Hirosada (弘貞) — Mainline · 1362-1368. Smith of the Chikuzen Sa School.
Ienaga (家永) — Mainline · 1444-1449. Smith of the Chikuzen Sa School.
Ienaga (家永) — Mainline · 1469-1487. Smith of the Chikuzen Sa School.
Morikuni (盛國) — Mainline · 1379-1381. Smith of the Chikuzen Sa School.
Moritsugu (守次) — Mainline · 1394-1428. Smith of the Chikuzen Sa School.
Moritsuna (守綱) — Mainline · 1375-1379. Smith of the Chikuzen Sa School.
Moriyoshi (盛吉) — Mainline · 1444-1449. Smith of the Chikuzen Sa School.
Moriyuki (盛行) — Mainline · 1394-1428. Smith of the Chikuzen Sa School.
Muneshige (宗重) — Mainline · 1394-1428. Smith of the Chikuzen Sa School.
Nagahide (長秀) — Mainline · 1444-1449. Smith of the Chikuzen Sa School.
Nagahiro (長廣) — Mainline · 1469-1487. Smith of the Chikuzen Sa School.
Nagaie (永家) — Mainline · 1449-1452. Smith of the Chikuzen Sa School.
Naonaga (直永) — Mainline · 1492-1501. Smith of the Chikuzen Sa School.
Nobushige (信重) — Mainline · 1504-1521. Smith of the Chikuzen Sa School.
Norikuni (教國) — Mainline · 1504-1521. Smith of the Chikuzen Sa School.
Norimitsu (教光) — Mainline · 1441-1444. Smith of the Chikuzen Sa School.
Norimitsu (教光) — Mainline · 1501-1504. Smith of the Chikuzen Sa School.
Norimitsu (教光) — Mainline · 1387-1389. Smith of the Chikuzen Sa School.
Norinaga (教永) — Mainline · 1469-1487. Smith of the Chikuzen Sa School.
Oishi (大石) — Mainline · 1469-1487. Smith of the Chikuzen Sa School.
Sa (左) — Mainline · 1368-1375. Smith of the Chikuzen Sa School.
Sa (左) — Mainline · 1492-1501. Smith of the Chikuzen Sa School.
Sa (左) — Mainline · 1356-1361. Smith of the Chikuzen Sa School.
Sadafusa (貞房) — Mainline · 1356-1361. Smith of the Chikuzen Sa School.
Sadahide (貞秀) — Mainline · 1368-1375. Smith of the Chikuzen Sa School.
Shigezane (茂實) — Mainline · 1501-1504. Smith of the Chikuzen Sa School.
Takemune (武宗) — Mainline · 1624-1644. Smith of the Chikuzen Sa School.
Tanenori (種則) — Mainline · 1573-1592. Smith of the Chikuzen Sa School.
Tokisaki (時前) — Mainline · 1387-1389. Smith of the Chikuzen Sa School.
Tokiyuki (時行) — Mainline · 1346-1370. Smith of the Chikuzen Sa School.
Tomohiro (朝廣) — Mainline · 1489-1492. Smith of the Chikuzen Sa School.
Tomotada (友忠) — Mainline · 1356-1361. Smith of the Chikuzen Sa School.
Toshinaga (耆長) — Mainline · 1532-1555. Smith of the Chikuzen Sa School.
Toshinobu (利延) — Mainline · 1441-1444. Smith of the Chikuzen Sa School.
Toshiyuki (俊行) — Mainline · 1368-1375. Smith of the Chikuzen Sa School.
Tsugunaga (着永) — Mainline · 1558-1570. Smith of the Chikuzen Sa School.
Yasuhiro (安弘) — Mainline · 1345-1350. Smith of the Chikuzen Sa School.
Yasumori (安盛) — Mainline · 1368-1375. Smith of the Chikuzen Sa School.
Yasuyoshi (安吉) — Mainline · 1346-1370. Smith of the Chikuzen Sa School.
Yoshinaga (良永) — Mainline · 1455-1457. Smith of the Chikuzen Sa School.
Yoshizane (吉眞) — Mainline · 1381-1384. Smith of the Chikuzen Sa School.
Yukiaki (行觀) — Mainline · 1394-1428. Smith of the Chikuzen Sa School.
Yukihiro (行弘) — Mainline · 1381-1384. Smith of the Chikuzen Sa School.
Yukisuke (行助) — Mainline · 1469-1487. Smith of the Chikuzen Sa School.
Live·Sa lineage
左文字
The Chikuzen Sa School
The southern school where Sōshū steel met Kyūshū. Founded in Chikuzen by Samonji — son of Jitsua and a student of Masamune — the Sa line carried the Sōshū tradition into the Nanbokuchō, from the founder’s celebrated 大左 work through the later Sue-Sa generations.
Other smiths of this phase— students & parallel lines
Sub-schools— branch houses of the Chikuzen Sa School
The Chikuzen Sa School (左文字) Lineage
The The Chikuzen Sa School (左文字), active 1330–1450 in Chikuzen Province across 74 documented smiths: 4 Kokuhō (National Treasures), 17 Jūbun, 20 Jūbi, 42 Tokubetsu Jūyō, 257 Jūyō.
Phase 1 · Ō-Sa (大左) · 1330 – 1344
At the head of the Sa line stands its founder, the smith who cut the single character 左 on his tang and is read in the published genealogies as Saemon Saburo, called O-Sa or Samonji. The NBTHK setsumei place him as the grandson of Sairen and son of Jitsua, the old Chikuzen succession of Ryosai, Sairen, and Jitsua whose steel ran sunken and rustic in a *suguha* the school inherited from Yamato. Since the Muromachi sword books he has been counted among the pupils of Masamune of Sagami, one of the Masamune Juttetsu, and the judges treat that *Soshu-den* schooling as the pivot of his identity: against the provincial manner of his forebears he is the reformer who carried the Sagami idiom into Kyushu. His working life falls in the early Nanbokucho period, and the single 左, often paired with 筑州住 on the reverse, becomes the founding mark from which the whole line takes its name. This is the apex generation, the work of O-Sa's own hand rather than the broader Sue-Sa pupils who follow.
What the setsumei describe is a steel that runs bright and clear where the older Kyushu work ran dark. The *jigane* is a well-knit *itame*, tight *ko-itame* on the small *tanto* and standing more open on the wide *katana*, carrying dust-fine *ji-nie* thickly, abundant *chikei*, and a faint *nie-utsuri*; the verdict recurs that *ji* and *ha* alike run limpid and *saeru*, one judge noting steel that shows "absolutely none of the whitish cast or blackish tone" of lesser Kyushu work. Over that ground O-Sa tempers a *Soshu-den* *notare* mixed with *gunome* and *ko-gunome*, the *nioi* deep and the *nie* thick, with *ashi* and *yo* entering and fine *kinsuji* and *sunagashi* drawn through the *ha*; *yubashiri*, *tobiyaki*, and *muneyaki* appear on the broader blades. The *boshi* is the structural signature the judges look to: it thrusts up (*tsukiage*) to a pointed tip, runs long *hakikake*, and returns at length. The *tanto* are small, of thin *kasane* and *hira-zukuri*, with a withered (*kare*) *fukura*. Set against this, the later Sue-Sa hands read as weaker and more standardized, their *midare* shallower and their *ji* less keen, so that O-Sa stands alone for the force of his pointed *boshi* and the brilliance of his Chikuzen steel.
For kantei, the setsumei route attribution first through the *ji* and the point: the bright, clear *ji-nie* free of whiteness is what separates an O-Sa blade from its Soshu fellows when the thrusting, pointed *boshi* alone will not, and the record divides cleanly into signed *hira-zukuri* *tanto* of flowing fine chisel and *osuriage-mumei* *katana* papered Den Sa. Signature works anchor the phase: the Kosetsu Samonji (江雪左文字), repeatedly named his only surviving signed *tachi* and a National Treasure, and the Danjo Samonji in *kanmuri-otoshi-zukuri*, held by the Uesugi house. Named *meibutsu* run through the great families: the Onishi Samonji passed through the Doi and Tokugawa to Arima of Kurume, the Homoji to Tachibana of Yanagawa, others to the Owari Tokugawa, the Sendai Date, the Sakai of Himeji, and the Inaba; one *tanto* recorded in the Kotoku Toezu was among the personal swords of the Taiko, Hideyoshi himself. The Sa school is the place where the Sagami manner becomes a Kyushu one, and these blades are the record of that transformation in O-Sa's own hand.
Sa (左) — Mainline · 1334-1338. Kokuhō, Jūbun, Jūbi, Tokujū, Jūyō. Sa, commonly called O-Sa or Samonji, is the Chikuzen smith who carried the Soshu manner into Kyushu and stands, by the count of the Muromachi sword books, among the pupils of Masamune. The published sources read the single character 左 he cut on his tang as an abbreviation of Saemon Saburo, and place him as the grandson of Sairen and the son of Jitsua, the line of Chikuzen smiths descended from the old Kyushu tradition. That tradition, in the words the NBTHK restates on blade after blade, was one whose 地刃が沈み、鄙びた直刃調のもの, a sunken, rustic suguha inherited from Yamato. Against it O-Sa is the reformer: he broke wholly from his grandfather's and father's manner and is credited with having 垢ぬけした乱れ刃の作域を創作, founding a clear, unprovincial midare style, and so lifting Chikuzen work to a rank it had never held. Around him a large school formed, his pupils Yasuyoshi, Yukihiro, Yoshisada, Kunihiro, Hiroyasu, Hiroyuki and Sadayoshi each carrying the manner into the Nanbokucho years and into the later history of the Kyushu blade. He worked in the Genko and Kemmu years of the early Nanbokucho period.
What the change amounts to is a steel that runs bright and clear where the old Kyushu work ran dark. His ji is an itame, well knit on the small tanto and standing open on the grand katana, carrying ji-nie laid down dust-fine, 地沸微塵, and frequent dark chikei. The published record returns again and again to the same judgment, 地刃共に澄んで明るく冴える, that ji and ha alike are limpid, bright and lucid, and on the finest pieces the NBTHK adds that the ji has neither the whiteness nor the blackness of lesser Kyushu steel. Over that ji he tempers a notare base mixed with gunome and ko-gunome, the *nie* deep and the *nioiguchi* bright, with *ashi* and *yo* entering and fine *kinsuji* and *sunagashi* drawn throughout the *ha*. The reform is summed in a recurring phrase the sources use for his new manner, 地景や金筋の目立つ乱れ主調の新作風を樹立した, an irregular temper led by conspicuous *chikei* and *kinsuji*.
The single feature that most reliably marks his hand sits in the *boshi*. Across his surviving work the temper of the point thrusts up and runs to a sharp tip with a long brushed return, 突き上げて先が尖って迫力があり, the published sources noting its force and its long *kaeri* even on pieces where they decline to fix the individual hand. On the tanto a faint *nie-utsuri* rises in the ji, the *ko-itame* knits tight, and the *ha* keeps a quieter, more even register; on the wide katana the temper grows fuller, *yubashiri*, *tobiyaki* and *muneyaki* appear, the *nie* thickens and at times turns rough, and the whole carries what the NBTHK repeatedly calls a *haki*, a martial spirit. The activity is read first in the ji and in the point, and the bright Chikuzen *ji-nie*, free of whiteness, is what tells him from his Soshu fellows when the *boshi* alone will not.
His record divides cleanly into two registers, and the division is the key to reading him. The signed pieces are almost all small tanto, *hira-zukuri*, with little or no *sori*, thin *kasane* and a withered *fukura*, signed in fine, flowing chisel 左 on the omote and 筑州住 on the ura; these the NBTHK calls his canonical work, one such described as 左文字の見どころを余すところなく示した典型作, a typical piece showing every point of recognition, another as 相州伝上工の実力を遺憾なく発揮した, the full skill of a first-rate Soshu hand. The grand katana, by contrast, are *osuriage-mumei*, wide in the body with little taper and a *kissaki* extended in the Nanbokucho manner, papered as Den Sa. A third group is read only to the school: a piece marked simply 左, or carrying a red-ink 三木左, often means the broad excellence of the Sa line rather than the master himself, the published sources cautioning that 個名は特定し得ないまでも, even where the individual name cannot be settled, the thrusting, pointed *boshi* should not be overlooked. The old books' placing of him in Masamune's circle the NBTHK treats with care, allowing the point remains open while holding the Soshu influence on his reform to be plain.
Against his Soshu peers the distinction is drawn by his own grounded traits rather than by theirs. His bright, clear ji and the thrusting *togari-boshi* set him apart, and the recurring institutional verdict that ji and ha run limpid and lucid is the through-line that holds the two registers together as one hand. Within Kyushu the contrast is sharper still, and the sources make it the heart of his importance: where Sairen and Jitsua before him left a sunken, rustic *suguha*, O-Sa's *midare* is the bright unprovincial style that reorients the whole tradition, his pupils and the later Kyushu smiths working in his light. He is, in the plainest terms the record allows, the smith through whom the Soshu manner becomes a Kyushu one.
His is a Sai-jo saku hand by the Fujishiro rating, and the designations bear the standing out: among the works on record are four National Treasures, foremost the 江雪左文字, the Kosetsu Samonji, the only signed tachi of his to survive, with seven Important Cultural Properties and twenty-one at Tokubetsu Juyo besides, some seventy-seven designated works on record in all. The named meibutsu run through the great houses: the Onishi Samonji, held by the Arima lords of Kurume; the 弾正左文字, the Danjo Samonji long treasured by Uesugi Kagekatsu; pieces preserved in the Owari Tokugawa house, where one stood among the highest-graded blades of the collection, in the Date house of Sendai, the Sakai of Himeji, the Tachibana of Yanagawa, the Makino, and the Matsudaira of Shirakawa, one katana having passed through the hands of Hideyoshi himself. For the private collector the position follows from this history. The National Treasures and Important Cultural Properties are heritage held in public and long-private hands, not things that trade; of the rest the Tokubetsu Juyo and Juyo blades, fifty or so across the recorded tiers, are more findable than the works of the very rarest Kamakura names, yet a signed tanto or a securely papered Den Sa katana comes to market only rarely, and is a landmark of a collection when it does.
Phase 2 · Sue-Sa (末左) · 1338 – 1450
When the single character 左 passed from the founder's hand to those of his pupils and sons, the Sa workshop of Chikuzen entered the chapter the sword books gather under the name Sue-Sa. The NBTHK names the line repeatedly: Yasuyoshi, Yukihiro, Yoshisada, Kunihiro, Hiroyuki, Hiroyasu, Sadayoshi, with Kōan and Sadakuni read among them, each said to have taken up the master's manner. The succession is also a dispersal. Yasuyoshi, called a son of O-Sa, carried the style north from Chikuzen into Chōshū (Nagato), where his descendants and the smith Akikuni continued it; Hiroyasu, transmitted as a son of Yukihiro, is recorded as moving later to Aki. The dated work places this phase from the early *Nanbokuchō* years through Shōhei and Eiwa and on into the *Ōei* era of early Muromachi, by which point the Chōshū Yasuyoshi name had clearly passed to a second-generation hand whose pieces the judges separate by signature and workmanship from those of the first.
The inherited idiom is the *Sōshū-den* manner the founder brought from Sagami, read now at a generational remove. The ground stays *itame* mixed with *ko-itame* and *mokume*, the grain standing (*hada-dachi*), carrying thick *ji-nie* and frequent *chikei*, over which the smiths temper a *notare* or *suguha* base mixed with *gunome*, *ko-gunome*, and pointed (*togari*) elements, with *ashi* and *yō* entering, deep *nioi*, thick *ko-nie*, and fine *kinsuji* and *sunagashi* drawn through. The *bōshi* thrusts up (*tsukiage*) to a pointed tip with *hakikake* and a long return, the one trait the setsumei hold to across the whole line. Against the founder, the register shifts. Where O-Sa stands for bright, clear *ji-nie*, the Sue-Sa setsumei more often note a steel of darker, blackish cast and a *nioiguchi* tending toward *shizumi* (subdued). The pattern standardizes: signed work survives chiefly as *tantō*, and the judges remark that a strongly distinct individuality is hard to isolate among them. A Bizen lean enters at the edges, the setsumei reading in Yasuyoshi a *nioi*-dominant temper with *bō-utsuri* near the *ha* that mingles a Bizen character, and noting faint *utsuri* in several Hiroyasu blades.
A collector reads Sue-Sa against the apex through the same two anchors the school is judged by, ground and point, but inverted in emphasis. Because brilliance no longer settles the matter, *gunome* prominence becomes the working key: the Hon'ami house long appraised the most vigorously *midare* blades of the "Sa ichirui" to Kunihiro, and the conspicuous-*gunome mumei* *katana* repeatedly fall to Hiroyasu, while the pointed, brushed *bōshi* with its long *kaeri* keeps the attribution within the line. The named masters anchor the phase, Kunihiro for the boldest large-pattern *midare* enlivened by *yubashiri* and *tobiyaki*, Yasuyoshi for the Bizen-tinged Chōshū work, Sadakuni recorded as a son of Kunihiro whose few surviving *tantō* approach the founder's hand, Kōan and Hiroyasu reaching across into *Ōei*. The provenance threads through the great houses the setsumei cite: the signed Yoshihiro *tachi* from the Bizen Ikeda family, a Sadakuni *tantō* held by the Mōri, Hiroyasu blades transmitted in the Kuroda, Takasu Matsudaira, and Hisamatsu houses, several carrying Hon'ami Kōchū and Kōon *origami*. For the student of *Sōshū-den*, Sue-Sa is the Sagami manner held one step past its Chikuzen height, transmitted, divided across provinces, and carried into the Muromachi age.
Yasuyoshi (安吉) — Mainline · 1346-1370. Jūbun, Jūbi, Tokujū, Jūyō. A tanto dated Shohei 17 (1362) and signed Choshu ju Yasuyoshi (長州住安吉), today a Juyo Bijutsuhin, anchors nearly everything the published sources say about Yasuyoshi of Chikuzen. Its hand is identical to his customary signature, and on that identity rests the account repeated at the head of entry after entry: Yasuyoshi was the son of O-Sa (大左), succeeded him as the second generation of the Samonji line, and later moved from Chikuzen to Nagato. His dated work runs from Shohei 17 into the Joji era. The name did not end with him, for descendants or pupils carried it in Nagato into the early Muromachi period, the line the sources call Choshu-Sa (長州左). Across half a century of designations the NBTHK assigns him one constant character, stated in almost the same words each time: his is the work in which, "within the Sa family a Bizen temperament intermingles" (左一類の中にあって備前気質が混在する).
The signed record has a strict shape. Every signed Yasuyoshi is a wide, sunnobi tanto or ko-wakizashi in hira-zukuri, thin in kasane and shallow in sori, the full mid-Nanbokucho stance; where O-Sa's tanto stay small, his run large. The published sources state plainly that no authenticated signed tachi exists, so his tachi and naginata survive as osuriage mumei attributions. The mei itself is a large two-character signature cut with a somewhat thick chisel below the mekugi-ana at the center of the nakago. On occasion it is prefixed with the character Sa, a form headed by the meibutsu Hitotsuyanagi Yasuyoshi (一柳安吉), an Important Cultural Property. The record is just as exact about an absence: works signed Sa Yasuyoshi (左安吉) and Choshu ju Yasuyoshi both survive, but "one does not see examples signed Chikushu ju Yasuyoshi" (筑州住安吉と銘したものを見ない).
His jigane is an itame that flows and often stands, mixed with mokume, with ji-nie attached. Over it rises a whitish shirake-utsuri, a bo-utsuri, or a sugu-utsuri near the edge, and the published sources name this flowing, standing forging with its whitish cast the viewing point of the smith. The hamon is a shallow ko-notare mixed with gunome, ko-gunome and pointed elements, nioi-dominant with ko-nie. Ashi enter, fine sunagashi runs through, and kinsuji appear here and there. The boshi runs midare-komi or thrusts up in tsukiage fashion, leans slightly toward the edge, and ends pointed with light hakikake and a rather long return. Set against his father the judgment is plain: the brilliance of ji and ha falls short of O-Sa, one early entry stating without ceremony that "his skill as well does not reach his father" (技術も父に及ばない), and the boshi, lacking O-Sa's sharpness, often falls into a leaning tendency. These same qualities form the stated kantei trap. Nioi-dominant with ko-nie set in, his work "at first sight strays among Osafune pieces such as Kanemitsu" (一見兼光などの長船物に紛れる), and the standing utsuri only strengthens the impression.
Two registers complicate the portrait at its edges. A minority of his smallest tanto, nearly O-Sa's own size with a slightly withered fukura, keep close to the master: dust-fine thick ji-nie, fine chikei, at times a nie-utsuri, a bright clear nioiguchi with kinsuji and sunagashi sweeping through, the boshi pointed, a make the published sources call "truly mistakable for O-Sa" (正に大左に見紛う). On the Tokubetsu Juyo tanto signed Sa Yasuyoshi, the character Sa is fluent and close to O-Sa's own hand while the two characters of Yasuyoshi show a somewhat naive chisel; whether such pieces prove the tradition that O-Sa himself signed Yasuyoshi in his last years, or are instead Yasuyoshi's earliest work, the NBTHK leaves open for future study. At the other edge stand the Nagato years. Blades read as the Nanbokucho Choshu Yasuyoshi differ from his usual nioi-dominant hand: ji and ha take nie strongly, the notare grows bold with kuichigai-ba mixing in, sunagashi sweeps with kinsuji entering, and the boshi thrusts up to a point. Oei-dated work is judged plainly a successor generation, while the Eiwa-dated pieces stand unresolved between the founder's last years and a second generation, a question the published sources repeat as a subject for future research.
On unsigned blades of the Sa type his own marks decide the attribution. Where the flowing, standing itame carries a whitish utsuri, where the temper turns nioi-dominant in small patterns, and where the thrusting pointed boshi softens into a lean, the work is likened to Yasuyoshi within the school, and several osuriage katana have been so appraised. The pointed boshi is the Sa-family inheritance he never gives up; the softness of the edge is his own. The recent entries single out "the deep nioiguchi carrying a soft feeling" (柔らか味を帯びた塩相の深い匂口) and the rich activity working inside the ha, finding in them a strength that remains his even where the brilliance does not match his father's.
Fujishiro rates him Jo-jo saku, and the record is unusually legible: forty-five designated works are on record, thirty-six of them signed against seven unsigned. Six blades are Important Cultural Properties, headed by the meibutsu Hitotsuyanagi Yasuyoshi; four are Juyo Bijutsuhin, among them the dated Shohei 17 tanto; and thirty-three stand in the Tokubetsu Juyo and Juyo tiers, one Tokubetsu Juyo wakizashi praised as "the very finest within this smith's work" (同工作中の白眉). Fourteen blades carry recorded provenance: examples passed in the Bizen Ikeda and Inshu Ikeda houses, the Tosa Yamauchi and the Maeda, one tanto certified in the ownership of Tokugawa Iesato, and another treasured by Motoda Nagazane, the Confucian scholar of Kumamoto. Of recorded whereabouts today, blades rest in the Tokugawa Art Museum, the Fukuoka City Museum, the Tokyo National Museum and the Sano Art Museum. The Important Cultural Properties are patrimony and will remain where they are; much of the rest is held by institutions or in long private keeping, and a signed Yasuyoshi coming into open hands is an uncommon event, appearing only rarely and rewarding patience.
Kunihiro (國弘) — Mainline · 1346-1370. Jūbun, Tokujū, Jūyō. A small hira-zukuri tantō, signed Kunihiro saku and dated Shōhei 12 (1357), is the fixed point of his record: from it the published sources read the span of his activity, for signed work by his hand is otherwise scarce. Kunihiro worked in the Chikuzen Sa school, the Samonji line of the Nanbokuchō period, and is transmitted as a son of Yoshihiro or, by another account, of Sadayuki. The published sources place him among the leading hands carried on from Ō-Sa, in a school that, as they put it, emerged in the early Nanbokuchō and cast off the older traditional Kyūshū manner to establish a style in which the steel and temper are 'bright and clear, refined in workmanship' (地刃が明るく冴えて垢抜けした作風). Within that school Yasuyoshi, Yukihiro, Yoshisada, Kunihiro, Hiroyuki, Hiroyasu and Sadayoshi all inherited the master's manner; Kunihiro is the one to whom the boldest, highest-tempered work was assigned.
His characteristic hand is a large-patterned irregular temper led by undulation. The published sources name two manners in his work and describe the first as 'a somewhat large-patterned midareba with notare as the main theme' (のたれを主調としたやや大模様の乱れ刃), into which he sets *gunome*, *ko-gunome*, *ko-notare* and ha with a pointed tendency, the whole tempered high and flamboyant. The *nioi* is deep and the *nie* attaches thickly and unevenly, with coarse *nie* gathering in places; fine *kinsuji* and *sunagashi* spill into the *ji* and run freely, and *yubashiri*-like *tobiyaki* appears frequently. It is the showiest of the Sa-group manners, and the reason it is his: the Hon'ami house, judging Sa-group blades, tended to assign the name Kunihiro to those examples showing 'the most vigorously unsettled midare' (最もさかんに乱れ).
The *jigane* is the constant beneath both manners. It is a standing *itame* mixed with *mokume* and a flowing grain, thick in *ji-nie* with bold *chikei* entering frequently, the steel carrying a somewhat blackish cast. This is the Sōshū-derived *jigane* of the Sa school, open and active, not the bright tight *ko-itame* and *utsuri* of Bizen; where the forging tightens on his smaller signed pieces the *ji-nie* grows fine and the steel brightens. Over it the *bōshi* of the prime work runs into *midare-komi*, thrusts up and ends pointed, with vigorous *hakikake* and a long return, while the quieter pieces run straight to a small round. His second manner, named alongside the first, is a *suguha*-toned temper mixed with *gunome*, calmer and seen chiefly on the *hira-zukuri* tantō and the *sun-nobi* wakizashi.
Most of his surviving record is not signed at all. The Sa school's long Nanbokuchō tachi were shortened in later centuries into katana, and the great majority of blades that carry his name today are *ō-suriage mumei*, wide in body with little taper, shallow in *sori* and large in the *kissaki*, the grand high-Nanbokuchō shape. On these the published sources affirm the Sa school from every point and judge the manner 'most fittingly compared to Kunihiro within the school' (同派の国弘に最も擬せられる), precisely because the tempering is high and large in scale, the *nie* variable, the internal activity abundant and the *yubashiri*-like *tobiyaki* well marked. The signed tantō dated Shōhei 12 anchors the chronology; one signed tachi survives, published in the *Kōzan Oshigata*, and is held to be of high documentary value for the study of the whole line.
What sets him apart is named within his own school rather than against another. The hands of the Sa smiths are so closely matched that individual attribution is difficult, and the published commentary is candid about it: the attribution to Kunihiro rests on the boldness and scale of the workmanship, not on a single personal tell. He is distinguished from his schoolmates by carrying the most flamboyant, highest-tempered *midare* of the group, his bold *yubashiri* and pointed, thrusting *bōshi* the marks the judges look to. The same commentary is honest about his standing within the line, granting that his technique 'falls far short of Ō-Sa' (技術は遠く大左に及ばず); yet on his best small work the refined, bright *ji* and *ha* are found to share 'a continuous affinity with Ō-Sa' (一脈大左に相通ずるものがあって), the kinship that places him among the school's leading hands.
For the collector Kunihiro is a scarce Nanbokuchō name. Fujishiro grades him Jō-jō saku. He has no National Treasures; his record reaches the Important Cultural Property rank in two signed tantō preserved at shrines, one at Kotohira-gū in Kagawa and one at Shinonome Jinja in Ehime, both heritage held in religious keeping. Beyond these, the documented blades run through the higher modern tiers, four at Tokubetsu Jūyō and the rest at Jūyō, with roughly fifty designated works on record in all. Their provenance reaches into the daimyō houses, a katana once held by the Tokugawa shogunal family and a blade transmitted in the Hisamatsu Matsudaira house, with examples now in the Tokugawa Art Museum and the Iwate Prefectural Museum. Signed work is exceptionally rare and the dated tantō a document in itself; of the shortened mumei katana, only a small number fall in the Tokubetsu Jūyō and Jūyō tiers, so a Sa Kunihiro comes to a private collector only seldom, and a signed example rarer still, a tangible record of how the Sa school carried its bright, bold manner into the height of the Nanbokuchō.
Yoshisada (吉貞) — Mainline · 1345-1359. Jūbi, Tokujū, Jūyō. A wakizashi by Yoshisada dated Shōhei 13 (1358), cut on the reverse "ninth month, day" and on the face with the orderer's name "Shu Nagamasa," is the documentary anchor of his career: from it the published sources accept that he was a direct disciple of Ō-Sa, and fix his working years in the middle of the fourteenth century. Yoshisada is a smith of the Sa, or Samonji, school of Chikuzen, one of the *Sa-ichirui* who carried the school's manner forward in the Nanbokuchō period beside Yasuyoshi, Yukihiro, Yoshihiro, Kunihiro and Hiroyasu. He is traditionally held to be "a son of Ō-Sa" (大左の子と伝え), or at least a member of his immediate circle, and he signs simply "Yoshisada" or "Yoshisada saku," a piece additionally cut "Chikushū jū" not being encountered.
His hand is read first through what the published sources allow him as his one personal characteristic. They observe that the smiths of the Sa group show comparatively few individual tells, and then single Yoshisada out: "even within the Sa group his *hamon* becomes a small-patterned design, and in this lies his stylistic individuality" (左一類の中でも刃文が小模様となる点に吉貞の作風上の個性が窺え). That small-scale *midare* is the through-line of his work. Among signed pieces two manners are drawn. One is a calm, shallowly undulating *notare* on a *suguha* base; the other is a *gunome* temper that resembles his schoolmate Yasuyoshi but is worked, in the judges' words, "a little smaller and more compactly than his" (安吉に似てそれよりも少しく小ずむ). In both the *nie* adheres well, with fine *kinsuji* and *sunagashi* running through, the activity carried in *ko-ashi* and *yō* rather than in tall clusters, and the *bōshi* rising with a thrusting tendency to a pointed return.
The *jigane* is the Sōshū-derived steel the whole Sa line shares, and it is the constant beneath both his manners. Over a standing *itame* mixed with *mokume* and a flowing *nagare-hada*, the grain a little open, he lays thick *ji-nie* and well-entered *chikei*, the steel at times taking a darkish cast; on several blades a whitish *shirake*-style *utsuri* drifts in the ji. Against that *jigane* the temper stays comparatively small in scale. Where his quieter pieces run a gentle *notare*, deep in *nioi* and bright, his more active pieces gather the *gunome* into the compact pattern the sources name, with occasional coarser *nie* and, near the *monouchi*, *nie-suji* and *yubashiri*-like *tobiyaki* lending a varied scenery.
The two faces of his record sit side by side. The signed work is chiefly *wakizashi* and *tantō*: the Tokubetsu Jūyō *tantō* transmitted in the Mito Tokugawa house, *hira-zukuri* and wide, with strong *nie* in both *ji* and *ha* and a bright, clear *nioiguchi*, which the published sources call "an especially outstanding piece by this smith" (同工の出色の出来); the dated Shōhei 13 *wakizashi* bearing the orderer's name; and the Mononobe Yoshisada *tachi*, which tempers the *koshimoto* high into a brighter, livelier *midare* and shows how far the same hand could open. The other face is the *ō-suriage mumei* *katana* appraised as his, wide and powerful, several with an extended or large *kissaki*, a *ko-nie gunome-midare* with some *chōji* feeling over the standing itame, a *bō-hi* carved through; the judges note that even these unsigned attributions tend to the same small-patterned *hamon*, so the body of his oeuvre is read through that small *midare* rather than through any single signed tell. One such *katana* carries a gold-inlay attribution to Yoshisada by Hon'ami Mitsunori.
What sets Yoshisada apart within the Sa group is precisely that small-patterned temper. Where Yasuyoshi's *gunome* stands fuller, Yoshisada's is drawn smaller and more compact; where the line as a whole is read as showing few individual features, his compact *midare*, bright *nioiguchi* and pointed, thrusting *bōshi* recur from blade to blade as his own. He belongs to the generation that held the Sa school together after Ō-Sa, neither the founder's brilliance nor a late epigone, but a sound and recognizable hand whose individuality the NBTHK locates in scale rather than in flamboyance.
For the collector he is a documented but uncommon Nanbokuchō name. Fujishiro grades him Jō-jō saku. He has no National Treasures and no Important Cultural Properties; his record runs instead through four Tokubetsu Jūyō and forty-three Jūyō blades, with two *ō-suriage* *katana* holding the prewar Jūyō Bijutsuhin, one of them the Hon'ami Mitsunori gold-inlay piece now in the Seikadō Bunko. His blades carry distinguished provenance: the Mito Tokugawa house, with pieces traced to Tokugawa Ieyasu and Yorifusa, the Mōri family, the Bizen Ikeda family, and the Shimazu and Satake houses, with examples on deposit at the Kyoto National Museum and held in the Seikadō Bunko. The signed work is genuinely scarce, and "surviving examples in *tachi* form are exceedingly rare" (太刀の作例は稀有); most of what survives is held rather than traded, but a Jūyō-tier *mumei* attribution or, less often, a signed *wakizashi* or *tantō* comes to light from time to time, and a privately held Yoshisada is a rewarding thing for a collector to encounter, a clear document of how the Sa school read in the hands that carried it after its master.
Hiroyasu (弘安) — Mainline · 1346-1370. Jūbi, Tokujū, Jūyō. Hiroyasu is a smith of the Chikuzen Sa school, the Samonji line of the Nanbokuchō period, his active years fixed by two dated pieces, a tantō of Shōhei 20 and one recorded in the Umetada Oshigata of Shōhei 13. The published sources transmit him as a son, or by another account a pupil, of Yukihiro, and place him among the smiths carried on from Ō-Sa, the group broadly called the Sue-Sa. By the Nanbokuchō period the Sa school had emerged in Chikuzen and, casting off the older and somewhat rustic Kyūshū manner, taken in the Sōshū tradition to establish a style in which both ji and ha are bright and clear and run with chikei and kinsuji. Tradition adds that Hiroyasu later moved to Aki. Signed work survives only as hira-zukuri sun-nobi tantō and small wakizashi, signed tachi being unknown to the judges, so very nearly his whole katana record is ō-suriage and mumei, drawn from long Nanbokuchō tachi and naginata cut down into uchigatana, the attribution carried by the workmanship rather than by a name on the tang.
The feature that fixes his name is the gunome on his edge. Among the mumei blades the Hon'ami house judged within the Sa group, it was the ones in which gunome stands out conspicuously that were appraised to Hiroyasu, and the published sources put the point plainly, that among blades seen as the Sa lineage 「特に互の目の目立つものがよく見受けられる」, those in which the gunome is especially prominent are often encountered. His temper is a midare led by notare into which gunome, ko-gunome, ko-chōji and a little pointed-ha enter, the whole kept comparatively small in scale rather than gathered into towering clusters. Ashi and yō run well into it, the nie lies thick and a little uneven with coarse nie in places, and sunagashi runs frequently with kinsuji threading the line. Small yubashiri-like tobiyaki touch the edge here and there, an activity the judges find archaic and full of spirit. The bōshi runs midare-komi, thrusts up and ends pointed with vigorous hakikake and a deep return.
The jigane is the Sōshū-derived ji the whole school shares, and on Hiroyasu it stands open. It is an itame mixed with mokume, flowing grain and patches of large itame, the surface standing out rather than lying tight, with thick ji-nie and chikei entering finely and densely, the steel taking on a faintly blackish cast. This is the dark, active jigane of the Sa hands, not the bright tight ko-itame and midare-utsuri of Bizen; at most a thin nie-utsuri-like effect rises in the ji. The judges prize the clarity of the best of it, noting on one fine katana that the steel shows no cloudiness and no whitish dullness whatever, 「鉄の濁りや白気がいささかもなく」, while the nie lies thick and the line is bright. Over so dark and lively a ji the small-patterned gunome reads as the quieter, more intimate face of the grand Sōshū idiom the school had only lately taken up.
Within his own record the published sources draw a second manner alongside the first. Some of his work, and especially the pieces tradition has long called Hiroyasu, runs a calmer line, suguha-toned and somewhat compact, the nioiguchi taking a subdued, shizumi cast. From olden times appraisals to him were assigned to Sa-group blades showing a gently undulating midare grown somewhat small, of which the judges write that it 「やや小ずむところに少異がある」, that it differs slightly in being a touch compact. This subdued register sits on certain shortened katana and on the small signed work, the hira-zukuri sun-nobi wakizashi and tantō, where the gunome of the showy manner is muted and the calm line itself becomes the tell. The two faces are not phases of a career but two readings the school's connoisseurship has fixed to his name, the conspicuous gunome on the one hand and the compact, subdued midare on the other.
What sets him within the Sa school is what the judges candidly will not claim for him. Theirs is a lineage whose hands are so closely matched that individual judgment is very difficult, and the published sources grant that no single feature singles Hiroyasu out and that his skill is held to fall short of Yasuyoshi, the strongest of the group. He is distinguished instead by his own affirmed traits, the standing, blackish itame thick in chikei that marks the Sa jigane apart from Bizen, the prominent gunome the Hon'ami house reserved to his name, and the thrusting, pointed bōshi with its hakikake. He stands beside Yukihiro, Yasuyoshi, Yoshisada, Kunihiro, Hiroyuki and Sadayoshi as one of the smiths who carried the Sa manner forward from Ō-Sa into the later fourteenth century, and his blades, where the nie is thick and the tobiyaki touches the edge, keep something of the archaic flavor the judges call 「古雅な趣を醸し出している」.
For the collector Hiroyasu is an attainable name among the Sue-Sa, where Ō-Sa himself is not. Fujishiro grades him Jō saku. He has no National Treasures and no Important Cultural Properties; his record runs instead through three katana at the Tokubetsu Jūyō rank, two katana recognized before the war as Jūyō Bijutsuhin, and some nineteen blades at the Jūyō rank, several carrying old Hon'ami origami by Kōon, Kōchū and Mitsutada that document the long history of his attribution. His blades passed through daimyō and collector hands, the Kuroda, the Hisamatsu-Matsudaira, the Takasu-Matsudaira and other Matsudaira houses among the recorded provenances, with one Jūyō Bijutsuhin katana now in the Sano Art Museum. About twenty-two blades fall in the Tokubetsu Jūyō and Jūyō tiers, so a Hiroyasu comes to light from time to time rather than rarely, and a signed wakizashi or tantō, of which the judges note signed work is extremely few, is the more notable thing for a collector to encounter, valued as much for the study of the Sa group as a whole as for itself.
Yukihiro (行弘) — Mainline · 1350-1352. Kokuhō, Tokujū, Jūyō. Yukihiro is a smith of the Chikuzen Sa school of the early Nanbokuchō period, and the one fixed point in a lineage otherwise short of dates: the published sources call him 'the smith whose extant dated work is the earliest and whose workmanship approaches Sa most closely' (現存する年紀が最も古く、且つ作柄が極めて左文字に接近している刀工が行弘である). His activity is anchored by a tantō dated Kannō 1 (1350), held a National Treasure and said to display workmanship that calls Ō-Sa himself to mind. The Sa school had emerged a generation before, casting off the older classical Kyūshū manner to establish a style in which both *ji* and *ha* are bright and clear; Yukihiro, transmitted as Ō-Sa's leading pupil and by one account his son, is the smith the judges set nearest the master's own hand.
His recognized work is the small tantō, and its temper is the tell. Over the *jigane* he draws a shallow *notare* mixed with *gunome* and *ko-gunome*, with *ashi* and *yō* entering, in places *kuichigai-ba* and *nijūba*. The *nioi* is deep and *ko-nie* adheres thickly; fine *kinsuji* and *sunagashi* run well throughout, and the *nioiguchi* is bright and clear. The *bōshi* gives him away most plainly: it runs into a *notare-komi*, thrusts up, ends pointed with *hakikake*, and on the finest pieces the *kaeri* is tempered down long, at times meeting *muneyaki* along the back. This is the Sōshū-derived line of the Sa house, not the clove-flower of Bizen, and on Yukihiro it stays comparatively quiet, the activity carried in *nie* rather than in towering clusters.
The *jigane* is the constant, and where the published sources find him closest to the master. His is a well-knit *itame*, at times a *ko-itame* mixed with *mokume*, the grain standing somewhat, with dust-fine *ji-nie* laid thickly and *chikei* entering finely and frequently, the steel bright and clear. A *nie-utsuri* stands along the *ha* rather than the speckled reflection of old Bizen. On his best tantō the *jihada* tightens into a refined *ko-itame* of dust-fine *ji-nie* and intricately woven *chikei*, the manner the judges call most fitting to his hand, set apart from the boldly standing, more open *itame* the school assigns to his fellow pupil Kunihiro.
Because no long signed blade survives, his record in *tachi* length is carried by the *naginata* and *katana* attributed to him, whether by Hon'ami *kinzogan* or held as *den*. These are wider, with a standing *itame* running toward *masame* in places, *ji-nie* and an *utsuri* present, and a temper a touch broader and calmer than the tantō, a *ko-midare* or shallow *ko-notare*-flavored *gunome-midare* with *yubashiri* and the same pointed *midare-komi bōshi*. From the rare tantō signed 'Chikushū-jū Sa', whose chisel work matches his own, the published sources now infer 'the possibility that among works bearing the Sa signature there are pieces made or signed on another's behalf by Yukihiro' (行弘の代作・代銘が含まれている可能性). It is a connoisseur's question that follows directly from how near his hand runs to the master's.
What the judges name as his distinction is exactly that nearness. Within a school whose hands are so closely matched that attribution rests on the boldness of the work rather than a single personal feature, Yukihiro is set apart not by flamboyance but by refinement: the brightest, most thickly *nie*-laden *ji* and *ha*, 'exceptional surviving examples that display workmanship virtually identical to Sa himself' (左文字宛らの出来映えを示した出色の遺例). His pointed, thrusting *bōshi* and the deep clear *nioiguchi* are the Sa-group features pronounced on his blades; on the finest of his *mumei* tantō the published commentary judges that 'it shows a manner connecting in a single stream to Great Sa' (一脈大左に通ずる出来口) and that 'appraising it specifically as Yukihiro is the most appropriate conclusion' (行弘と鑑するのが最も至当). He is the disciple in whom the master's own hand is most nearly read.
For the collector he is a rare and exacting name. Fujishiro grades him Jō saku. His one *tachi*-length National Treasure aside, his record runs through the Important Cultural Property rank and the Tokubetsu Jūyō and Jūyō tiers, where ten of his blades sit, several of them *mumei* tantō judged the most fitting attributions to his hand. Provenance gathers around great houses: the *kinzogan* *naginata* by Hon'ami Kōtoku descends in the Kii Asano family, paired there with the *meibutsu tachi* 'Ō-Mihara', while his blades also pass through the Tokugawa and Yanagisawa houses and are today held at institutions including the Tsuchiura City Museum and the Gotoh Museum. Signed work is limited to a few small tantō, and long signed blades do not survive at all, so a privately held Yukihiro reaches the market only seldom and is a landmark when it does. It is not wholly beyond reach in the way the National Treasure tantō is, but for a smith the published sources place this close to Ō-Sa, a signed or finely attributed example is among the more notable things a collector of Sōshū work could hope to encounter.
Hiroyuki (弘行) — Mainline · 1346-1370. Jūbi, Tokujū, Jūyō. Hiroyuki is a smith of the Chikuzen Sa school, the Samonji lineage, working in the mid-Nanbokucho period around the Shohei era, and transmitted as a son of Yukihiro. He belongs to the group of followers the published sources call Sue-Sa, the smiths carried on from O-Sa after the school's founder. The Sa school emerged in the early Nanbokucho and broke decisively with the older Kyushu manner, in which the *ji* and *ha* are subdued and rustic in a restrained *suguha*; drawing on the Soshu tradition it established a style in which both *ji* and *ha* are bright and clear, with *chikei* and *kinsuji* intermingled. Hiroyuki worked within that style, and his place is fixed by the few dated and signed records the swordbooks preserve: a work said to bear a Shohei 20 date of 1365, against his father Yukihiro's piece of the Koan years. Signed work by his hand is extremely rare, so almost his whole surviving record is the *o-suriage mumei* katana, attributed to him from long Nanbokucho tachi later shortened.
His recognized hand is read most clearly in the temper. Over a wide, shallow-curved blade he forges a line based on *suguha* that carries a shallow *notare*, into which *gunome*, angular *gunome*, *ko-notare*, pointed *ha* and *ko-gunome* enter, often in a continuous, linked succession kept comparatively small in scale. The *nie* lies thick and uneven, with coarse *nie* gathering in clusters, *uchi-noke* and *yubashiri* touching the edge, and *kinsuji* and *sunagashi* running vigorously through it, the *nioiguchi* often taking a subdued, *shizumi* cast. What the published sources name as his tell is precisely this manner: among the Sa group, whose hands are so closely matched that the individual smith is hard to single out, it is the blade whose *gunome* stands out and runs continuously, and whose temper is comparatively restrained, the rises and falls not standing out strongly, that is read as Hiroyuki. Several of his entries close on the same judgment, that the work is the one 「弘行に最も擬せられるものであり」, most readily likened to Hiroyuki.
The *jigane* is the constant beneath both faces of his work. He forges a standing *itame* mixed with *mokume* and flowing grain, with patches of large *itame* in places, thickly covered in *ji-nie*, *chikei* entering well, the steel taking a somewhat blackish, whitish-misty cast. This is the Soshu-derived Sa *jigane*, an open, *nie*-laden steel rather than the bright, tightly packed Bizen *jigane* with its clear *utsuri*; where a reflection appears at all it is only a faint *nie-utsuri* or a whitish tendency. Beside the *gunome*-prominent line the published sources read a quieter register of the same hand, a *chu-suguha* with only a shallow *notare*, *ko-gunome* and angular elements entering sparingly, the pattern small, fine *hotsure* along the *habuchi*, and the *nioiguchi* subdued. The *boshi* in his bolder work runs *midare-komi*, thrusts up and ends pointed with vigorous *hakikake*; in the calmer register it runs straight to a *ko-maru*.
The two registers answer to how the blade was authenticated. The bold, *gunome*-prominent katana carry the school's spirited character, one Tokubetsu Juyo described as a 「放胆で覇気に溢れた出来口」, a bold and spirited workmanship. The quieter *chu-suguha* pieces, several bearing gold-powder attributions added by the Hon'ami house, show the wide *suguha* with *hotsure* and the subdued *nioiguchi* the appraisers long read as Hiroyuki. The published sources are candid about the limits of this judgment. They class him among the Sue-Sa, of whom they say that 「作風を区別することは困難である」, that distinguishing the styles of the individual smiths is difficult, and they note that the gold-powder attributions seen on his blades are a Meiji-and-later practice begun by the Hon'ami family. Of one such piece they grant openly that there is a question 「左弘行とまで断定し得るか否か」, whether it can be fixed conclusively as Sa Hiroyuki, while affirming that 「南北朝期の左の一派の作であることには異論がない」, that there is no dissent it is the work of the Nanbokucho Sa school.
What sets Hiroyuki apart is therefore a matter of degree within a closely matched school rather than a private signature. His own evidenced tells, the continuous *gunome* in a small-patterned, *suguha*-leaning temper, the standing *itame* with its blackish *nie*-laden steel, and the thrusting, pointed *boshi*, place him beside Yasuyoshi, Yukihiro, Yoshisada, Kunihiro, Hiroyasu and Sadayoshi, the Sue-Sa hands carried on from O-Sa. The published sources hold his skill within that company and affirm his *mumei* attributions from era and school, naming his comparatively calm, suguha-leaning manner as the side of the Sa tradition that bears his name. He stands one generation below the founder, working the grand Nanbokucho form in the school's bright, *nie*-rich idiom rather than reaching for the flamboyance of its first masters.
For the collector Hiroyuki is a documented Sa name carried at the higher modern designation tiers. Fujishiro grades him Jo saku. His record runs through two Tokubetsu Juyo katana, one of them carrying a Hon'ami Ringa gold-powder mei, two prewar Juyo Bijutsuhin, and some twenty-nine blades at the Juyo rank, thirty-one in the Tokubetsu Juyo and Juyo tiers together. His blades are rooted in daimyo provenance, the Ii family of Hikone, whose maru-ni-tachibana mounting accompanies one Tokubetsu Juyo, and the Nabeshima family, with further pieces passing through the Tsuchiya house of Tsuchiura and the Tokugawa, and one preserved in a municipal museum collection. Because almost his entire record is *mumei* and held in long-standing collections, a Hiroyuki seldom comes to market; when one does appear it is from the Juyo and Tokubetsu Juyo tiers, and the patient collector may encounter such a blade from time to time, a sound and forceful document of how the Sa school carried its bright Soshu manner into the second Nanbokucho generation.
Sadayoshi (貞吉) — Mainline · 1345-1350. Jūbun, Jūyō. Sadayoshi is a smith of the Chikuzen Sa school, the line of Samonji, working in the middle of the Nanbokuchō period. The published sources place him among the Sue-Sa, the second wave of pupils who carried the school forward after Ō-Sa: "Sadayoshi is said to have been the son of Yasuyoshi and is traditionally placed among the smiths active around the Bunna era" (貞吉は安吉の子で、文和頃の刀工と伝えており). Yasuyoshi was himself a son of Samonji, so Sadayoshi sits two generations down from the founder, in the company the commentary names together time and again, Yasuyoshi, Yukihiro, Yoshisada, Kunihiro, Hiroyuki, Hiroyasu and Sadayoshi. The Chikuzen Sa school had emerged in the early Nanbokuchō and broken decisively from the older, classical Kyūshū manner, establishing a new style in which both *jigane* and *hamon* are bright and clear and in which *chikei* and *kinsuji* stand out; Sadayoshi is one of the heirs who forged in that idiom.
The central fact of his record is its near-total reliance on attribution. The published sources state plainly that "extant signed works are extremely few" (現存する在銘作は極めて少ない), and almost everything that survives under his name is the *ō-suriage*, *mumei* katana judged to him. What allows the judges to single him out of the school is one feature, and the commentary names it without hesitation: a calm, *suguha*-based temper. They observe that "among unsigned blades appraised to the Sa group, one frequently encounters pieces whose tempering is founded on *suguha*" (無銘極めの刀には、左一類と見えて直刃を基調とした刃取りのものがよく見受けられる), and it is this restrained manner, long held the key point in appraising his work, that resolves a Sa-group blade specifically to Sadayoshi. On one katana the appraisal is put as simply as it can be, that "because the overall impression is comparatively gentle and quiet, it is reasonable to determine the attribution to Sadayoshi" (比較的におだやかにおとなしい点からであろう貞吉と極めているが妥当である).
The *jigane* is the Sōshū-derived steel he shares with the whole Sa line. He forges a standing *itame*, mixed with *mokume* and a flowing *nagare-hada*, the grain conspicuous and at times opening; over it the *ji-nie* lies thick and the *chikei* enter frequently, the steel inclining at times toward a dark tone, and on several blades a faint, whitish *utsuri* rises along the *shinogi*. Above the *jigane* the temper is a wide *suguha* or *chū-suguha* with a shallow *notare*, into which a little *gunome* and *ko-gunome* are mixed; *ashi* and *yō* enter, *kinsuji* and *sunagashi* run, the *nie* gathers thickly, and the *nioiguchi* at times tends to subside. The *bōshi* is the school's constant and his most reliable structural tell, rising with a thrusting *tsukiage* tendency to a sharply pointed tip and swept with *hakikake*, the feature the judges repeatedly call typical of the Sa lineage. A *bō-hi* is generally carved through.
Within that one *suguha*-led manner the attributions divide into a quieter and a more animated register. At its calmest the line is a wide *suguha* barely undulating, the activity carried in *ashi* and *yō* and in fine *kinsuji* rather than in any tall pattern. In a number of blades the same foundation opens out: the *yakihaba* widens, the line takes a *ko-notare* with *gunome* and angular elements, the *nie* thickens and grows uneven with coarser grains, *hotsure* frays the edge, *uchi-noke* and a *nijūba*-like doubling appear, and *yubashiri* or small *tobiyaki* collect near the *monouchi*. Even at its most active the body of the temper stays *suguha*, and the pointed, swept *bōshi* holds, so the reading remains Sa-group work given to Sadayoshi. The published sources judge several of these especially well made among works attributed to the smith, the broad *yakihaba* and abundant *nie* lending a powerful, splendid impression in concert with the bold Nanbokuchō shape. The blades are wide-bodied with little taper and an extended *chū-kissaki* or *ō-kissaki*, several refashioned from *naginata*, and a handful carry a later cutting inscription in gold inlay or, in one case, only a red-lacquer character on the tang, which the judges read not as the founder's name in the narrow sense but as a mark of the Sa group as a whole.
What distinguishes Sadayoshi within his own school is exactly the thing that makes him hard to find. The commentary reads the Sa group as a line of comparatively few individual features, the smiths so close in hand that their unsigned work is hard to separate; against that, his calm *suguha* and his pointed, swept *bōshi* are what carry a blade to his name rather than to a brother's. His bright, *chikei*-laden *jigane* and the *suguha*-toned edge set him apart from the more flamboyant *gunome* and *notare* of the wider Sa circle, and his is read as the quiet, classical face of the late school, the manner in which the Sōshū inheritance is held in restraint.
Fujishiro grades Sadayoshi Jō-jō saku, and his standing in the *Tōkō Taikan* is recorded at the middle rank. He has no National Treasures, and his record runs entirely through the modern designation tiers: a substantial body of his attributed katana, more than twenty, has reached the Jūyō rank across more than a dozen sessions of shinsa, several of them judged especially fine among works given to the smith. Provenance is thin in the published record; of recorded whereabouts one blade is held by the Kurokawa Institute of Ancient Cultures, the rest passing through private hands. Because a reliably signed Sadayoshi is among the rarest things in the late Sa record, the collector encounters him almost always through these unsigned, shortened katana, and even those come to market only from time to time and with patience. A blade securely papered as Sa Sadayoshi is not beyond reach in the way a National Treasure is, but it is a quiet, considered acquisition, valued less for a famous name than for the calm *suguha* hand by which the judges still know him.
Kunitada (國忠) — Mainline · 1429-1441. Jūbun. Smith of the Chikuzen Sa School.
Yoshihiro (吉弘) — Mainline · 1346-1370. Tokujū, Jūyō. Sa Yoshihiro is recorded in the reference works on sword signatures, with an example bearing a date of Shohei 23 (1368), and he is traditionally said to have been the son of O-Sa (Yukihiro). He was active during the Nanbokucho period as part of a broad lineage descending from Dai-Sa, among whose disciples and successor smiths there were in fact quite a few. Within that group, however, signed examples are not many; those known to bear signatures include Yasuyoshihiro, Yukihiro, Kunihiro, Hiroyasu, Yoshisada, Yoshihiro, and Hiroyoshi. Even so, the great majority of signed works are limited to *tanto* and *wakizashi*, and signed *tachi* are exceedingly rare, owing to the prevailing fashion of the period for large *odachi* of over three *shaku* in length, many of which were later shortened and converted into *uchigatana*.
The workmanship commonly shared by the Sa group includes a forging pattern of flowing *itame* in *ko-itame-hada*, tightly forged, with fine dense *ji-nie* accumulating thickly, and *chikei* appearing. The tempering exhibits a dominant tone of gentle undulation with an *urumi* (moist, soft) quality, into which *gunome*, *ko-midare*, and *choji* are intermingled. *Sunagashi* runs throughout and *kinsuji* appear, while *ashi* and *yo* enter frequently. The *nioiguchi* is clear, with strongly manifest *nie* and *ko-nie* adhering well, at times mixed with *ara-nie*. The *boshi* characteristically enters in a *midare-komi* manner, showing a *tsukiage* tendency that rises to a pointed impression before turning back. Works attributed to Yoshihiro display this full constellation of Sa-school hallmarks: wide *mihaba*, shallow *sori*, and extended *o-kissaki* that clearly exhibit the characteristic features of the Nanbokucho period.
The smiths of this lineage were broadly comparable in skill, and their styles do not differ greatly, making discrimination among them on a case-by-case basis difficult. Notwithstanding this, the NBTHK has consistently recognized that works transmitted as Sa Yoshihiro exhibit the distinctive traits of the group with particular strength, and that their *jigane* and *hamon* are *kenzen* (sound and well-preserved). The tradition of attribution to Yoshihiro has been accepted as reasonable on the basis of both period and manner of workmanship. Within the larger Sa school, Yoshihiro's works stand as representative examples of the group's achievement, embodying the refined Soshu-influenced forging and tempering idiom that defined the Chikuzen swordmaking tradition at its height.
Sadakuni (貞國) — Mainline · 1362-1368. Tokujū. Smith of the Chikuzen Sa School.
Other smiths
Akikuni (顯國) — Mainline · 1394-1428. Akikuni is the Nagato continuation of the Samonji line. The published sources place him among the later disciples of Sa Yasuyoshi, taken on after Yasuyoshi carried the Sa name out of Chikuzen and into Chochu, and the reference works on signatures add that he was the son of Chochu Yasuyoshi. The same works caution that the name is not quite a single man: they list six smiths who bore it, beginning with a smith of the Bunwa era in the line of Sa Yasuyoshi and including the Oei-period hand described as the son of Chochu Yasuyoshi, so that Chochu Akikuni is best read as a name handed down through the Nagato workshop. Among his extant dated works the earliest are of the Oei era, with later examples reaching into the Bunan years, which sets him in the early Muromachi period carrying a provincial, late reading of the Soshu manner the Sa line had taken up.
The published sources state his temper in a single sentence of connoisseurship, that his work includes both blades in suguha and blades in which nie develops strongly and a linked gunome-midare is formed (彼の作風には直刃のものと、沸づいて互の目乱れが連れたものがある). The latter is the manner they call representative. On his tachi dated Oei 31 the gunome-midare runs linked, with ashi entering and the nie adhering, and on the signed wakizashi the same temper carries small notare, a deep nioi, with sunagashi and kinsuji drawn through. The suguha manner appears in its fuller form on his broadest katana, a chu-suguha base bearing a slight notare with gunome and ko-gunome, ko-ashi and yo entering, the ko-nie uneven in places with slight hotsure and small yubashiri, kinsuji and sunagashi present, the nioiguchi tending to sink. The boshi answers the temper face by face: straight into a ko-maru with a long return finely swept in hakikake on the suguha piece, midare-komi turning back with a pointed tendency on the mumei katana, and on the Oei 31 tachi yaki-kuzure on one face with a straight o-maru on the other.
The jigane is itame, often standing, mixed with mokume and nagare-hada, with thick ji-nie and fine chikei-like lines of steel. On his broadest katana a faint shirake-utsuri stands and the steel carries a slightly blackish cast, the marks of a peripheral late-Sa forge rather than the bright Chikuzen ji. Bo-hi are carved on both faces, at times with companion grooves running partway up the blade. Of that broadest katana the published sources write that there is a rustic character to the workmanship which, with the large kissaki, conveys a vigorous, commanding spirit (総じて作域に野趣があり、大鋒の形状と相俟って、覇気が感ぜられる), and they note that large-scale blades of this kind are scarce within his oeuvre, its imposing form resembling that of an orikaeshi-mei katana by the same smith certified before the war as an Important Art Object.
The signature itself is part of the kantei. Signed works are comparatively few, the standard mei cut in five characters as Chochu-ju Akikuni (長州住顕国), and among the Oei-dated examples some add the title Saemon no Jo (左衛門尉) while others state the place of residence as Chochu Setozaki junin (長州瀬戸崎住人). One katana carries the mei folded over on a shortened tang, an orikaeshi-mei (折返銘), the omote groove carried through into the folded portion. Because the reference works gather several Akikuni under the one name, a date and a place-name in the inscription do as much to anchor a piece as the manner of the temper. His tachi of Oei 31 is valued by the published sources for exactly this reason, the representative example of his connected gunome-midare in which his characteristic features are readily seen, both ji and ha well executed, the Oei date itself prized as documentary material (この太刀はその後者の代表的な作で、彼の特色がよく見られ、地刃の出来がよく、応永年紀は資料的に貴重である).
The lineage to Sa Yasuyoshi is the axis on which his attributions turn, and the published sources argue it from both sides. On a mumei katana shaped like a shortened Nanbokucho tachi they concede that the workmanship does not connect directly to Yasuyoshi's own style, yet accept the handed-down attribution all the same (安吉に直結する作風ではないが所伝を認めることができる). On the signed wakizashi they read the positive case, finding in both the jihada and the hamon a current of workmanship descending from Yasuyoshi (地刃に安吉からの流れが窺える). Taken together the two readings place Akikuni at the provincial far end of the Sa tradition, carrying the Samonji manner into Nagato and into the early Muromachi period with a coarser, more nie-driven character than the Chikuzen source.
Akikuni is a smith of the standing the collector meets through his designated blades rather than his name. Fujishiro grades him Jo saku, and his record on the books is four works at the Juyo level, none raised to the higher designations, a profile that fits a fine provincial hand of the Sa descent. Provenance, where it survives, is fitting to that reading: his work descended in the great houses of his own province, the Ouchi of Suo and Nagato and the Mori who succeeded them, a transmission that reads like the local history of the blade. Recorded ownership beyond that is thin, as it usually is for a smith of this rank, and no museum holding can be claimed from the record. A signed and dated Akikuni is not a blade that comes often to market, and when one does it is met as the work of a well-documented branch smith of the Sa line, a vigorous early-Muromachi piece carrying the Samonji descent into Nagato, valuable to the student of the school for the directness with which it shows a country forge working in the old tradition.
Sadahiro (貞弘) — Mainline · 1368-1375. Smith of the Chikuzen Sa School.
Sadayuki (定行) — Mainline · 1350-1352. Sadayuki belonged to the Sa school of Chikuzen Province, a lineage that emerged in the early Nanbokucho period and broke decisively from the classical styles previously characteristic of Kyushu workmanship. Traditionally regarded as a student of Yukihiro, with an alternative transmission placing him under Yasuyoshi, Sadayuki is recorded with an extant date of Shohei 12 (1357) in the *Umetada Oshigata*, placing his activity squarely at the zenith of the Nanbokucho period. One theory holds that he later relocated to Aki Province. Signed works are few, and the overwhelming majority of attributions rely on *kinzogan-mei* appraisals, including examples authenticated by Hon'ami Koshitsu.
The designated pieces exhibit the unmistakable technical vocabulary of the Sa lineage in both *jihada* and *hamon*. The forging shows *itame* mixed with *mokume* and *nagare-hada*, with fine *hada-dachi*, thickly applied *ji-nie*, and abundant *chikei*, producing a bright and luminous *jigane*. The *hamon* is characteristically founded on a shallow *ko-notare* mixed with *gunome*, *ko-gunome*, and *togariba*, with strongly adhering *nie* and frequent *hataraki* including *kinsuji*, *sunagashi*, and intermittent *yubashiri* at the *yakigashira*. The *boshi* enters *midare-komi* and turns back with a pointed tendency, often showing *hakikake*. Where the *nie* is particularly thick, *nie-kuzure* appears along the *habuchi*, lending the temper a vigorous and expressive character.
Sadayuki's works preserve the heroic proportions of their era: wide *mihaba*, extended *chu-kissaki*, and generous *hiraniku* in the long blades, and *sunnobi* *hira-zukuri* forms in the shorter pieces. Both *ji* and *ha* are consistently bright and clear, confirming the Sa school's refined sensibility, and the sound condition of these blades attests to the enduring quality of Sadayuki's forge craft.
Yasuyoshi (安吉) — Mainline · 1394-1428. Yasuyoshi, the son of O-Sa, succeeded as the second generation of the Sa lineage and is traditionally said to have moved from Chikuzen to Choshu (Nagato Province). This account is supported by an extant tanto dated Shohei 17 (1362) bearing the inscription "Choshu-ju Yasuyoshi," whose manner of signing matches his usual style. Subsequent works explicitly stating "Choshu Yasuyoshi" include examples dated to the Eiwa and Oei eras. The Oei-dated pieces are judged to be by a successor generation on the basis of workmanship and signature style, while whether the Eiwa-dated works represent late production by the first generation or early work by a successor remains a subject for future research. Descendants and students continued the Yasuyoshi name for several generations from the late Nanbokucho through the early Muromachi period, collectively known as "Choshu Sa."
In the forge, Yasuyoshi's work typically displays *itame-hada* mixed with *mokume* and *nagare-hada*, with the grain sometimes standing and *ji-nie* adhering. A whitish *shirake-utsuri* is a hallmark of the school, and tightly forged pieces show extremely fine *ji-nie* with delicate *chikei* and clear steel. The *hamon* most characteristically takes the form of shallow *ko-notare* mixed with *gunome*, with *ashi* entering and a *nioiguchi* that is bright and clear. The temper is primarily *nioi*-dominant with *ko-nie*, accompanied by fine *kinsuji* and *sunagashi*. The *boshi* typically enters in *midare-komi* with a pointed tendency and a long *kaeri*. Compared with O-Sa, the setsumei consistently note that Yasuyoshi's work does not exhibit the same degree of brilliance in both *jigane* and temper, though certain pieces with strong *nie* and *kuichigai-ba* demonstrate a broader range within his oeuvre.
Yasuyoshi's blades are generally of larger and more imposing *sugata* than those of his father, with wide *mihaba* and thin *kasane*. Among his finer works, the forging is well-refined and compact, with the Sa school's characteristic features clearly retained. Pieces of distinguished provenance, including examples transmitted in the Inshu Ikeda and Maeda collections, attest to the esteem in which his work has long been held.
Akikuni (顯國) — Mainline · 1368-1375. Akikuni (顯國), second generation, worked in Nagato Province (Choshu) during the Oan era (1368-1375) and is transmitted as a disciple from after Sa Yasuyoshi relocated to Choshu. Reference works on signatures list six smiths of this same name, beginning with a smith of the Bunwa era said to have belonged to the Sa Yasuyoshi lineage, and continuing through a smith described as the son of Choshu Yasuyoshi who was active around the Oei era. The earliest extant dated works bear *nenki* from the Oei period, and later examples dated Bun'an are also recorded. Among the Oei-dated group, some pieces carry the title "Saemon no Jo," while others explicitly state the place of residence as "Choshu Setozaki junin." Signed works are comparatively few, lending particular documentary value to surviving examples. Fujishiro rates this smith *jo saku*.
Akikuni's manner of working encompasses several distinct modes: blades in *suguha*, works mixing small *notare* and *gunome*, and *midareba* in which *gunome* runs in a continuous, connected pattern (described as *tsure-gokoro*). The *kitae* characteristically shows *itame-hada* mixed with *mokume* and *nagare-hada*, often tending toward *hada-dachi*, with dense *ji-nie* and fine *chikei*-like lines of steel. A faint whitish *utsuri*-like effect or *shirake-utsuri* frequently appears, and the ground steel often shows a somewhat dark, iron-like tone. In the *hamon*, *nie* adheres well, with *hotsure*, *kinsuji*, and *sunagashi* running prominently. The *nioiguchi* tends to show a *shizumi* character. Overall, the workmanship conveys a rustic (*yashu*) and vigorous quality rooted in the Sa school tradition.
Akikuni occupies a noteworthy position among the swordsmiths of the Choshu Yasuyoshi group, preserving a current of workmanship descending from Sa Yasuyoshi while displaying an independent, robust character. The range of surviving work spans both restrained *suguha* compositions and powerful *gunome-midare* pieces of commanding presence, and large-scale blades within the oeuvre are scarce, making such examples especially valuable for understanding the chronology of production. Both *jihada* and *hamon* in the finest examples are *kenzen*, and the abundant internal activities -- *ashi*, *sunagashi*, and *kinsuji* emerging distinctly within the temper -- attest to accomplished skill. As a smith whose signed works remain rare, each surviving piece carries considerable importance as reference material for the study of the Choshu school.
Akikuni (顯國) — Mainline · 1558-1570. Smith of the Chikuzen Sa School.
Haruakira (治劍) — Mainline · 1346-1370. Smith of the Chikuzen Sa School.
Hiroyoshi (弘吉) — Mainline · 1345-1350. Smith of the Chikuzen Sa School.
Morihiro (盛廣) — Mainline · 1334-1338. Smith of the Chikuzen Sa School.
Morisada (守貞) — Mainline · 1492-1501. Smith of the Chikuzen Sa School.
Moriyoshi (盛吉) — Mainline · 1368-1375. Smith of the Chikuzen Sa School.
Sadaaki (貞秋) — Mainline · 1394-1428. Smith of the Chikuzen Sa School.
Sadakiyo (貞清) — Mainline. Smith of the Chikuzen Sa School.
Yasuyoshi (安吉) — Mainline · 1379-1384. Smith of the Chikuzen Sa School.
Yasuyoshi (安吉) — Mainline · 1469-1487. Smith of the Chikuzen Sa School.
Yasuyuki (安行) — Mainline · 1312-1317. Smith of the Chikuzen Sa School.
Yasuyuki (安行) — Mainline · 1345-1350. Smith of the Chikuzen Sa School.
Yukiaki (行觀) — Mainline · 1356-1361. Smith of the Chikuzen Sa School.
Yukisue (行末) — Mainline · 1352-1356. Smith of the Chikuzen Sa School.
Hirosada (弘貞) — Mainline · 1362-1368. Smith of the Chikuzen Sa School.
Ienaga (家永) — Mainline · 1444-1449. Smith of the Chikuzen Sa School.
Ienaga (家永) — Mainline · 1469-1487. Smith of the Chikuzen Sa School.
Morikuni (盛國) — Mainline · 1379-1381. Smith of the Chikuzen Sa School.
Moritsugu (守次) — Mainline · 1394-1428. Smith of the Chikuzen Sa School.
Moritsuna (守綱) — Mainline · 1375-1379. Smith of the Chikuzen Sa School.
Moriyoshi (盛吉) — Mainline · 1444-1449. Smith of the Chikuzen Sa School.
Moriyuki (盛行) — Mainline · 1394-1428. Smith of the Chikuzen Sa School.
Muneshige (宗重) — Mainline · 1394-1428. Smith of the Chikuzen Sa School.
Nagahide (長秀) — Mainline · 1444-1449. Smith of the Chikuzen Sa School.
Nagahiro (長廣) — Mainline · 1469-1487. Smith of the Chikuzen Sa School.
Nagaie (永家) — Mainline · 1449-1452. Smith of the Chikuzen Sa School.
Naonaga (直永) — Mainline · 1492-1501. Smith of the Chikuzen Sa School.
Nobushige (信重) — Mainline · 1504-1521. Smith of the Chikuzen Sa School.
Norikuni (教國) — Mainline · 1504-1521. Smith of the Chikuzen Sa School.
Norimitsu (教光) — Mainline · 1441-1444. Smith of the Chikuzen Sa School.
Norimitsu (教光) — Mainline · 1501-1504. Smith of the Chikuzen Sa School.
Norimitsu (教光) — Mainline · 1387-1389. Smith of the Chikuzen Sa School.
Norinaga (教永) — Mainline · 1469-1487. Smith of the Chikuzen Sa School.
Oishi (大石) — Mainline · 1469-1487. Smith of the Chikuzen Sa School.
Sa (左) — Mainline · 1368-1375. Smith of the Chikuzen Sa School.
Sa (左) — Mainline · 1492-1501. Smith of the Chikuzen Sa School.
Sa (左) — Mainline · 1356-1361. Smith of the Chikuzen Sa School.
Sadafusa (貞房) — Mainline · 1356-1361. Smith of the Chikuzen Sa School.
Sadahide (貞秀) — Mainline · 1368-1375. Smith of the Chikuzen Sa School.
Shigezane (茂實) — Mainline · 1501-1504. Smith of the Chikuzen Sa School.
Takemune (武宗) — Mainline · 1624-1644. Smith of the Chikuzen Sa School.
Tanenori (種則) — Mainline · 1573-1592. Smith of the Chikuzen Sa School.
Tokisaki (時前) — Mainline · 1387-1389. Smith of the Chikuzen Sa School.
Tokiyuki (時行) — Mainline · 1346-1370. Smith of the Chikuzen Sa School.
Tomohiro (朝廣) — Mainline · 1489-1492. Smith of the Chikuzen Sa School.
Tomotada (友忠) — Mainline · 1356-1361. Smith of the Chikuzen Sa School.
Toshinaga (耆長) — Mainline · 1532-1555. Smith of the Chikuzen Sa School.
Toshinobu (利延) — Mainline · 1441-1444. Smith of the Chikuzen Sa School.
Toshiyuki (俊行) — Mainline · 1368-1375. Smith of the Chikuzen Sa School.
Tsugunaga (着永) — Mainline · 1558-1570. Smith of the Chikuzen Sa School.
Yasuhiro (安弘) — Mainline · 1345-1350. Smith of the Chikuzen Sa School.
Yasumori (安盛) — Mainline · 1368-1375. Smith of the Chikuzen Sa School.
Yasuyoshi (安吉) — Mainline · 1346-1370. Smith of the Chikuzen Sa School.
Yoshinaga (良永) — Mainline · 1455-1457. Smith of the Chikuzen Sa School.
Yoshizane (吉眞) — Mainline · 1381-1384. Smith of the Chikuzen Sa School.
Yukiaki (行觀) — Mainline · 1394-1428. Smith of the Chikuzen Sa School.
Yukihiro (行弘) — Mainline · 1381-1384. Smith of the Chikuzen Sa School.
Yukisuke (行助) — Mainline · 1469-1487. Smith of the Chikuzen Sa School.