Muromachi turned sword making into an industry: the uchigatana rose with massed infantry warfare, Osafune and Seki produced bundle swords beside custom orders, and the Ming trade carried Japanese blades abroad by the tens of thousands.
This katana is attributed to the Echizen Rai school, active from the Nanbokuchō to early Muromachi periods in Echizen Province. It is connected to the prestigious Rai school of Yamashiro Province, with Kuniyasu (Chiyozuru Kuniyasu) being a central figure in its establishment. The blade comes with an NBTHK Tokubetsu Hozon certificate, indicating its authenticity and high artistic value.
Offered by Samurai Museum


























Yamashiro-den · Echizen
5 pieces on the market now
| Smith | Era | Designated |
|---|---|---|
| Echizen越前 | 1336-1392 | 1 |
The Muromachi period (1392 to 1573)
Muromachi turned sword making into an industry: the uchigatana rose with massed infantry warfare, Osafune and Seki produced bundle swords beside custom orders, and the Ming trade carried Japanese blades abroad by the tens of thousands.
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 siteReturns/exchanges limited to defects caused by shipping (except willful misconduct or gross negligence by the company); customers must contact within 72 hours of receiving the product.
¥1,350,000