NihontoWatchKoto Bizen, late Kamakura, with koshirae Shinogi-zukuri, high shinogi, low iori-mune, chu-kissaki. Kitae: ko-itame mixed with nagare-hada, strongly hada-dachi in places, thick ji-nie, midare-utsuri, utsuri appearing in jifu-style, jitetsu is good. Hamon: choji, ko-choji, ko-gunome, mixed with ko-midare, the habuchi is tight with a dominance of nioi, becoming urumi-gokoro in places, with many choji-ashi, ko-ashi, and yo within the ha. Boshi: ko-midare with deep yaki, the tip is slightly hakikake and kaeru. Nakago: o-suriage, saki-kiri, yasurime o-sujikai. Double copper gold-foiled habaki (some peeling on the foil). Period polish. In shirasaya. Wakizashi koshirae (total length 73, Edo period. Saya: black ro-saya. Kojiri: shakudo polished ground with suemon kin-zogan, wisteria design. Kozuka: shakudo takabori kin-iroe, warrior on a boat design. Kogai: shakudo nanako-ji takabori iroe, bouquet in a vase design. Sageo: dark brown. Tsuka: oya-same with black tsuka-maki. Fuchi-kashira: shakudo nanako-ji takabori iroe, fox and autumn grasses design. Menuki: kin-zogan dragon design. Tsuba: reddish shakudo polished ground, round shape, mumon) included. The major lineages of Bizen smiths during the Kamakura period were the two great schools of Ichimonji and Osafune; the Ichimonji school flourished in places such as Fukuoka, Yoshioka, Katayama, and Iwato, producing many master smiths. Among them, the group that forged swords from the late Kamakura period onwards in Iwato-sho, Bizen Province (near present-day Iwato, Wake-cho, Wake-gun, Okayama Prefecture), is called Iwato Ichimonji. Based on the place name, a connection with the Bizen Wake smiths can also be inferred. According to meikan and other records, the founder is said to be Yoshiuji, but there are no authentic signed works at all. As for extant works, a piece by Yoshiie remains with the mei "Ichi Bishu Iwato-sho Jito Saemon-no-jo Minamoto Yoshiie" and a date of Gentoku (1329-31), which allows us to infer the approximate period of activity for the school. This work, although o-suriage mumei, is a blade with a kiwame of "Iwato Ichimonji," with a nagasa of just under 1 shaku 7 sun 2 bu, possessing a supple and elegant style. The jitetsu shows midare-utsuri and jifu-style utsuri, and the ha, mixed with choji, ko-choji, ko-gunome, and ko-midare, has a habuchi that is tight with a dominance of nioi, becoming urumi-gokoro in places, with many choji-ashi, ko-ashi, and yo within the ha. There is fine kitae-hada in the ji and some togiberi appropriate for its age, but with the finely changing hamon, the scenery of the ha-sakai, and the vivid utsuri, this is a blade that demonstrates the merits of Bizen Ichimonji from the end of the Kamakura period in every part.
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Bizen-den · Bizen
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The Iwato Ichimonji school represents a small but distinctive branch of the broader Ichimonji lineage that flourished in Iwato-shō, Bizen Province, from the late Kamakura period into the Nanbokuchō era. According to sword reference works, the school's founder is traditionally identified as Yoshimitsu or Yoshiuji, though extant signed works are primarily represented by Yoshiie, whose blades bear elaborate inscriptions such as "Ichi Bishū Iwato-shō jitō Sahyōe-no-jō Minamoto Yoshiie"[[c:1]] with dates from the Gentoku era. Like other Ichimonji branches in Fukuoka and Yoshioka, these smiths employed the signature convention of cutting the character ichi (一, "one") into the nakago, either alone, combined with individual names, or omitted entirely in favor of personal signatures. The technical characteristics of Iwato Ichimonji workmanship reveal a refined aesthetic distinct from the more prominent Fukuoka Ichimonji style. The forging typically exhibits tightly wrought itame-hada mixed with mokume, with standing grain (hada-dachi) and extremely fine ji-nie adhering thickly throughout the jigane. Fine chikei enter frequently, and midare-utsuri appears prominently.
The hamon is characteristically based on chōji mixed with ko-gunome and angular elements, but the overall patterning tends toward smaller scale and more restrained undulation compared to Fukuoka works—the chōji heads are less pronounced, and the midare composition is more subdued. Ko-ashi and yō enter well, and the nioiguchi displays a tight, bright quality (shimarigokoro) with ko-nie, kinsuji, and fine sunagashi appearing along the temper boundary. Iwato Ichimonji blades demonstrate a high level of forging skill consistent with mainline Bizen production, particularly in the excellence of their jihada and the clarity of boundary activities. While the school's output is regarded as somewhat less exuberant than Fukuoka Ichimonji, the restrained elegance of their small-patterned midare and the soundness of their construction have earned recognition within the broader Ichimonji tradition. The survival of multiple unsigned examples attributed to this school, alongside Yoshiie's signed works, attests to a coherent technical identity that remained recognizable across generations of smiths working in this Bizen locale during one of the most accomplished periods of Japanese sword production. Learn more →
| Smith | Era | Designated |
|---|---|---|
| Yoshimori吉守 | 1368-1375 | 0 |
| Yoshiuji吉氏 | 1362-1368 | 0 |
| Yoshimori吉守 | 1394-1428 | 0 |
| Yoshichika吉近 | 1375-1379 | 0 |
| Sukeie助家 | 1321-1324 | 0 |
Bizen in the Kamakura period
Kamakura was Bizen’s summit. Tradition places Ichimonji smiths among Go-Toba’s goban kaji, Mitsutada founded the Osafune line at mid-century, and orders flowed from the court and the warrior government alike. No province holds more National Treasure blades.
A Hozon-certified blade judged to show notably superior workmanship and a better state of preservation. The bar is higher: re-tempered blades and most unsigned Muromachi/Edo works are excluded.
The NBTHK (Nihon Bijutsu Tōken Hozon Kyōkai, the Society for the Preservation of Japanese Art Swords) is a public-interest incorporated foundation founded in 1948 and supervised by Japan’s Agency for Cultural Affairs (Bunkachō); it is based at the Japanese Sword Museum in Tokyo. Its expert panels physically examine each submitted work (shinsa) and issue a certificate (kanteishō) ranking it by artistic and historical merit. NBTHK papers are the most widely recognized standard of authentication for Japanese swords and fittings.
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