Katana in Shirasaya(NBTHK Tokubetsu Hozon paper)
Signature : Mumei(Den Bizen Osafune Naruie)
middle Koto:Cyujyo saku ranking: Ryo wazamono cutting test ranking:Bizen
(We divide 4 sections for each sword as Saijyo saku, Jyojyo saku Jyo saku and regular saku)
This sword belongs to jyo-Jyo saku ranking.
The blade was polished by good polisher.
Habaki :gold foiled douboe habaki.
Blade length : 72.6 cm or 28.58 inches.
Sori : 2.0 cm or 0.78 inches.
Mekugi : 2
Width at the hamachi : 3.1 cm or 1.22 inches.
Width at the Kissaki : 2.91 cm or 1.14 inches.
Kasane : 0.65 cm or 0.25 inches.
Era : Nanbokucyo period. 1336-1392
Shape : The blade is called Naginata naoshi style.
The blade is wide and thick with deep sori and long kissaki gorgeous style.
Jigane :Koitame hada and komokume hada well grained with jinie attach
beautiful Yamashiro style texture.
Hamon :Niedeki suguha based and gunome midare mixed with double hamon and sunagashi, kinsuji work.
Boshi is very wild feeling active hamon yakizume style and brush up.
Special feature: Bizen Osafune Naruie was a son of the Bizen Shigeyoshi.
This blade was made middle Nanbokucyo period.
The blade looks likeYamashiro style bizen sword.
On the Jigane, there are some lose hada on the Shinogo ji but not serious.
The blade is healthy and nice attractive Jigane and Hamon.
Recently it is rather difficult to buy this kind of long naginatanaoshi style sword.
NBTHK Tokubetsu hozon paper.
Aoi Art estimation paper : whole Oshigata.