NihontoWatchMishima-ju Yusuisin Sadayoshi was a tosho born in Tokushima Prefecture in 1908 (Meiji 41), and in Showa 3, he entered the apprenticeship of Gassan Sadakatsu, the father of the Osaka Ningen Kokuho Gassan Sadakazu, to study kanto. In Showa 18, he moved to Omiya-cho, Mishima City, Shizuoka Prefecture. During the war, he produced many swords and used the names Enomoto Kichiro, Yusuishi, and Yusuisin. After the end of the war, he received special prizes at various exhibitions including the Shinsaku Meito Ten and became a Mukansa tosho of the highest rank. Sadayoshi was the preeminent master of kitae among the students of Gassan Sadakatsu and was famous as a master on par with Gassan Sadakazu and Takahashi Sadatsugu (both Ningen Kokuho); he crafted swords using spring water flowing from Mount Fuji, vigorously producing works aiming for the Ayasugi-hada known as Gassan-hada as well as the high-level smiths of the Soshu-den, and became a focus of popularity for many aito-ka. He passed away in 2000 (Heisei 12) at the age of 92.
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Machine translation from the shop's Japanese · may contain errors ·
Shinshinto · Shizuoka · around 1926-1989
1 piece on the market now
Shinshinto · Settsu
27 pieces on the market now
| Smith | Era | Designated |
|---|---|---|
| Sadaharu貞晴 | 1865-1868 | 0 |
| Sadayoshi貞吉 | 1926-1989 | 0 |
| Yoshiaki吉明 | 1844-1848 | 0 |
| Naonobu直信 | 1854-1860 | 0 |
| Sadayoshi貞吉 | 1830-1863 | 0 |
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.
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.
NBTHK official siteNo cooling-off period or returns; refund only if the purchased sword is proven fake, capped at purchase price (excludes commission sales, accessories, auction items).