This is an Akasaka school tsuba with ashi-sukashi (reed openwork) design. The tsuba is made of iron and has been designated as Tokubetsu Hozon Tosogu (specially preserved fittings). The Akasaka school was active from the early Edo period and known for their refined iron tsuba.
kiwame · Edo

Akasaka
Edo
Musashi
kiwame
Tokuho (NBTHK)
A Hozon-certified fitting of notably superior craftsmanship and condition, often with signature or workmanship of high reference 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 siteReturns/exchanges/cancellations not accepted after shipment except for significant defects; if defective, return/exchange possible within 3 days of arrival (return shipping paid by customer).
This is an Akasaka school tsuba with ashi-sukashi (reed openwork) design. The tsuba is made of iron and has been designated as Tokubetsu Hozon Tosogu (specially preserved fittings). The Akasaka school was active from the early Edo period and known for their refined iron tsuba.
kiwame · Edo

Akasaka
Edo
Musashi
kiwame
Tokuho (NBTHK)
A Hozon-certified fitting of notably superior craftsmanship and condition, often with signature or workmanship of high reference 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 siteReturns/exchanges/cancellations not accepted after shipment except for significant defects; if defective, return/exchange possible within 3 days of arrival (return shipping paid by customer).