Perry’s arrival in 1853 unraveled the Tokugawa peace and created the first mass demand for working swords in two centuries. Kiyomaro, called the Masamune of Yotsuya, died on its eve; Munetsugu and Yukihide carried the boom to the end.
This is a charming tanto by Sadaharu (Kenryushi), a student of Gassan Sadakazu and a master active from the Keio to Meiji periods. The blade features a well-packed itame hada and a suguha hamon with some gunome, showing a unique form often seen in Koto or Shin-Shinto periods. It comes with a distinctive aikuchi koshirae featuring a whale whisker wrapped tsuka and a finely carved samegawa saya, along with a rare silver-inlaid umahari.
NihontoWatchmei · Keio (1865-1868) · nagasa 18.9cm
Shinshinto · Settsu · around 1865-1868
Tōken Taikan top 95%
7 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 |
Perry’s arrival in 1853 unraveled the Tokugawa peace and created the first mass demand for working swords in two centuries. Kiyomaro, called the Masamune of Yotsuya, died on its eve; Munetsugu and Yukihide carried the boom to the end.
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 siteThis is a charming tanto by Sadaharu (Kenryushi), a student of Gassan Sadakazu and a master active from the Keio to Meiji periods. The blade features a well-packed itame hada and a suguha hamon with some gunome, showing a unique form often seen in Koto or Shin-Shinto periods. It comes with a distinctive aikuchi koshirae featuring a whale whisker wrapped tsuka and a finely carved samegawa saya, along with a rare silver-inlaid umahari.
NihontoWatchmei · Keio (1865-1868) · nagasa 18.9cm
Shinshinto · Settsu · around 1865-1868
Tōken Taikan top 95%
7 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 |
Perry’s arrival in 1853 unraveled the Tokugawa peace and created the first mass demand for working swords in two centuries. Kiyomaro, called the Masamune of Yotsuya, died on its eve; Munetsugu and Yukihide carried the boom to the end.
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
![Katana - by Gassan Sadaharu - Mei: Nagakuchi Sadaharu made this in Naniwa [engraved] - Commissioned by Masuda-shi of Matsumoto Domain, Keio Gannen Kinoto-Ushi Kikumon](/_next/image?url=https%3A%2F%2Fitbhfhyptogxcjbjfzwx.supabase.co%2Fstorage%2Fv1%2Fobject%2Fpublic%2Flisting-images%2Fchoshuya%2FL35853%2F00.jpg&w=2560&q=90)
