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 is a mumei wakizashi attributed to Kai Mihara Masaoki, a smith from the Mihara school in Bingo province, active during the Muromachi period. It features a straight hamon with small nie and active elements, and a tight itame hada with flowing masame. The blade comes with an NBTHK Hozon Token certificate and is housed in a shirasaya.
Masaoki正興
Offered by Yazawa Shokai







Bingo · around 1469-1487
Tōken Taikan top 60%
1 piece on the market now
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.
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.
NBTHK official site¥280,000