Ordering number: 20304
Katana in Shirasaya (NBTHK Tokubetsu Hozon Token)
Signature: Aoi mon Yasutsugu Oite Echizen Saku Kore(Echizen 3rd generation)
Sayagaki: Echizen 3 dai Yasutsugu Saku Second generation younger brother
Length is 2syaku 3sun 3bu Kanzan shi.
Toko Jiten:shinto: Cyujyo saku:Echizen.
(We divide 4 sections for each sword as Saijyo saku, Jyo-jyo saku Jyo saku and regular saku)
This sword belongs to Saijyo saku ranking.
The blade was polished.
Blade length: 70.6 cm or 27.8 inches.
Sori : 1.06 cm or 0.42 inches.
Width at the hamachi: 3.2cm or 1.26 inches.
Width at the Kissaki: 2.35 cm or 0.93 inches.
Kasane :0.73 cm or 0.29 inches.
The weight of the sword 775 grams.
Era : Edo period kanbun era.
Shape: The blade is wide and thick with small sori and longer kissaki.
Jigane: Koitame hada well grained with jinie attach and blackish
the northern part of the texture.
Hamon :Nie deki with deep nioikuchi suguha and notare deep soft feeling
Hamon. Bo-shi is also deep nioikuchi round shape hamon.
Special feature: 3rd generation Yasutusgu succeeded 2nd generation
and called Uma no sue and later on, he called Ichinojyo.
From Aoi Art: Generally, 3rd generation’s Yasutusugu work is slightly
inferior compare with Edo 3rd generation Yasutsugu.
But this sword is deep nioikuchi suguha noter
with soft deep nioikuchi Ashi bright and clear hamon.
I think this 3rd generation Yasutsugu is high ranking best sword I think.
NBTHK Tokubetsu Hozon Token
Aoi Art estimation paper: whole Oshigata.