This is a Shin-Shinto period tanto by Gassan Sadaharu, dated Keio 3 (1867), and certified Tokubetsu Hozon by the NBTHK. It features a powerful 10mm kasane and a unique horimono for protection from demons. The tanto comes with a complete koshirae, shirasaya, and custom kiri-bako.
mei · Gassan · Keio (1865-1868) · nagasa 18.2cm
















Shinshinto · Settsu · around 1865-1868
Tōken Taikan top 95%
6 pieces on the market now
Shinshinto · Settsu
41 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 |
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 site3 day inspection period on all sales. Items can be returned for any reason for a full refund, less return shipping cost. Returned items must be in the same condition as when purchased.

This is a Shin-Shinto period tanto by Gassan Sadaharu, dated Keio 3 (1867), and certified Tokubetsu Hozon by the NBTHK. It features a powerful 10mm kasane and a unique horimono for protection from demons. The tanto comes with a complete koshirae, shirasaya, and custom kiri-bako.
mei · Gassan · Keio (1865-1868) · nagasa 18.2cm
















Shinshinto · Settsu · around 1865-1868
Tōken Taikan top 95%
6 pieces on the market now
Shinshinto · Settsu
41 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 |
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 site3 day inspection period on all sales. Items can be returned for any reason for a full refund, less return shipping cost. Returned items must be in the same condition as when purchased.
