TOKUBETSU HOZON, Osafune Yasumitsu 長船康光, Ouei-Bizen 応永備前, Early Muromachi period

Osafune Yasumitsu (長船康光) was a master Bizenden (備前伝) craftsman active around the Oei period (応永年間) in the early Muromachi period.
This Sunnobi-TANTO Blade is in very good condition.

Includes a Shirasaya and Matsushiro-Koshirae. The Koshirae features a Kozuka and Kogai.
The Shirasaya features a Sayagaki (鞘書) autographed by Fukunaga Suiken Sensei (福永酔剣先生).
Sayagaki is Shimada Gisuke.

Includes an NBTHK Tokubetsu Hozon Certificate.

Signature : Mumei (Osafune Yasumitsu)
Nagasa : 310mm (12.20 in.) 
Sori : 3mm (0.12 in.) 
Total length : 500mm (19.69 in.) 
Motohaba : 24mm (0.94 in.) 
Sakihaba : 16.2mm (0.64 in.) 
Motokasane : 5.2mm (0.20 in.) 
Sakikasane : 3.4mm (0.13 in.) 
Blade Weight : 168g
Total Weight : 444g