AS25470 Tanto: Bishu Osafune Yasumitsu(1416)(NBTHK Tokubetsu Hozon Token)

Tanto in Shirasaya with Koshirae (NBTHK Tokubetsu Hozon Token)

Inscription: Bishu Osafune Yasumitsu 備州長船康光
Ouei 23 Nen 2gatsu hi (Fuburary 1416)

We divide works in to Saijo Saku, Jyojyo Saku, Jyo Saku,and Regular Saku.
This piece is ranked as Jyojyo Saku for Osafune Yasumitsu.

Habaki: fold-plated single habaki
Blade Length:32.2 cm（12.7 in）
Curvature: 0.0 cm（0.0 in）
Width at Base(Motohaba): 2.56 cm（1.0 in）
Thickness: 0.50 cm（0.2 in）
Blade Weight: 200g
Era: the early Muromachi period

Shape: slightly wide and thin Sun-nobi(extended) Tanto.
Jigane: Itame hada with Chikei and Utsuri.
Hamon: Nioi-base Gunome midare with Ashi.

Features: Chukoto: Owazamono: Josaku: Bizen
The Bizen smiths of the early Muromachi period are known as “Oei Bizen.” Among them, Yasumitsu, along with Morimitsu, is recognized as one of the representative swordsmiths of this school.
This piece is a well-preserved tanto and a valuable work bearing a dated inscription from the Oei era.

Koshirae:
metal fittings: silver base carved with a pattern of waves
Menuki: a desing of citrus

NBTHK Tokkubetsu Hozon Certificate
Aoi-Art estimation Paper
whole Oshigata