NihontoWatchOrdering number:24311Katana in Shirasaya (NBTHK Hozon Token)Signature: Osaki Yasumune Saku KoreShowa 55 Nen 2 Gatsu Hi (February 1980)大崎靖宗作之昭和五十五年二月日(We divide 4 sections for each sword as Saijyo Saku, Jyojyo Saku, Jyo Saku, and Regular Saku.)This piece is ranked as Jyo Saku among works by Osaki Yasumune.Habaki: Copper Double-layered HabakiBlade Length: 72.8 cm (28.66 in)Curvature: 1.8 cm (0.71 in)Mekugi Hole: 1Width at Base (Motohaba): 3.30 cm (1.30 in)Width at Tip (Sakihaba): 2.55 cm (1.00 in)Thickness (Kasane): 0.71 cm (0.28 in)Sword Weight: 870 g (1.92 lbs)Era: Showa 55 (1980)Shape:A well-balanced piece with a broad body, solid thickness, proper curvature, and a slightly extended tip.Jigane (Steel Surface):A finely forged ko-itame hada, resulting in a high-quality and well-refined steel texture.Hamon (Temper Line):A nioi-based gunome-midare, with active ashi (downward streaks) and prominent sunagashi and kinsuji within the hamon.The boshi (tip tempering) is rounded and curves back.Aoi Art’s Comment:Osaki Yasumune was born in Taisho 4 (1915) in Yamagata Prefecture.He was a disciple of Shimazaki Yasukou and Yakuwate Yasutake.After the war, he was an active swordsmith, achieving three Effort Awards and fifteen selections in competitions.He specialized in the Bizen tradition, producing highly regarded works.NBTHK Hozon CertificateAoi Art Estimation PaperWhole OshigataPrice:550,000JPYOrder FormRelated Items:Katana: Miyairi Akihira Saku Kore An auspicious day in February, Showa 34 (1959), Made for Mr. Kunio Kanzawa (NBTHK Tokubetsu Hozon Token)Tachi: Sanryūtei Ryōsanshi Masamine Saku Kore (Living National Treasure) Dated: August, Year of the Wood Rabbit (1975) (NBTHK Tokubetsu Hozon Token)Katana:Minamoto Moriyoshi & Yoshitsugu Collaboration (1976)(NBTHK Tokubetsu Hozon Token)Katana:Osaka Gassan Sadakazu Saku(stamped) Meiji 30 Nen 8 Gatsu Hi Motte Soushu Kamakura Masamune Den(NBTHK Tokubetsu Hozon Token)Katana:Oite Nihon-so Yoshiwara Kuniie Seitan(NBTHK Hozon Toke
Certificate reading — 銘 大崎靖宗作之 昭和五十五年二月日
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Tokyo · around 1926-1989
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Shōwa to the present: destruction and revival
The twentieth century nearly killed the craft twice: wartime distortion, then the occupation ban. The NBTHK’s founding in 1948 and licensed forging from 1953 rebuilt the sword as an art, crowned by Living National Treasures and the mukansa rank.
Certifies a genuine blade worth preserving: a signature confirmed correct, or, if unsigned, an era, province, and school that the NBTHK can reliably identify.
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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