After the Ōnin War broke the Ashikaga order, a century of Sengoku warfare armed nearly every province in Japan. The era rewards a discriminating eye: routine work exists in quantity, and beside it stand custom blades of the first rank.
This is an early Muromachi period Tanto by Mihara Masaoki. It comes with a stunning, all-matching koshirae and is accompanied by an NBTHK Hozon certificate. The blade features a suguha hamon and hira-zukuri shape.
Offered by Nihonto Art

































Bingo · around 1469-1487
Tōken Taikan top 60%
1 piece on the market now
The Muromachi period (1392 to 1573)
After the Ōnin War broke the Ashikaga order, a century of Sengoku warfare armed nearly every province in Japan. The era rewards a discriminating eye: routine work exists in quantity, and beside it stand custom blades of the first 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.
NBTHK official siteIf the item fails to meet the description, it may be eligible for a return (at the seller's discretion). Item(s) must be shipped back only via FedEx or UPS within 48 hours of receipt, in original undamaged state. Costs are the purchaser's responsibility.