This is an unsigned (mumei) tsuba attributed to the Kotosho school, featuring a nimai-kasasukashi (two umbrella openwork) design. It dates to the late Muromachi period and comes with NBTHK Hozon Tosogu certification. The tsuba is made of iron with a hammered surface and a round shape.
Certificate reading — 無銘（古刀匠）
NihontoWatchmumei · Kotosho · Muromachi
Ko-tosho School
Muromachi
Unsigned
Hozon (NBTHK)
Tosho-Katchushi
Certifies a genuine fitting worth preserving: a correct signature, or, if unsigned, an identifiable era and school, with recognized artistic and craft value.
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).
This is an unsigned (mumei) tsuba attributed to the Kotosho school, featuring a nimai-kasasukashi (two umbrella openwork) design. It dates to the late Muromachi period and comes with NBTHK Hozon Tosogu certification. The tsuba is made of iron with a hammered surface and a round shape.
Certificate reading — 無銘（古刀匠）
NihontoWatchmumei · Kotosho · Muromachi
Ko-tosho School
Muromachi
Unsigned
Hozon (NBTHK)
Tosho-Katchushi
Certifies a genuine fitting worth preserving: a correct signature, or, if unsigned, an identifiable era and school, with recognized artistic and craft value.
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).
