Tanto in Shirasaya with Koshirae (NBTHK Hozon paper)
Signature : Hideyasu Saku (Late Muromachi period)
(We divide 4 sections for each sword as Saijyo saku, Jyojyo saku Jyo saku and regular saku)
This sword belongs to regular saku ranking.
The blade was polished.
Habaki : copper single habaki.
Blade length : 20.9cm or 8.22inches.
Sori :0 cm or 0 inches.
Mekugi : 3
Width at the hamachi : 1.83cm or 0.72inches.
Kasane : 0.57cm or 0.22inches.
The weight of the sword: 95 grams.
Era : Late Muromachi period
Shape : Kanmuri-otoshi tanto with sharpness
Jigane : koitame hada well grained with jinie attach.
Hamon : Nie Deki, Gunome Midare with thick Nioikuchi from Hamachi. There are Mizukage Utsuri.
In the Ha, there are Sunagashi and Kinsuji.
The Hamon is very close to the edge.
Special feature: There are not any Kizu and defect. Hamon is not perfect because of transition of the times, but it is attractive.
The signature Hideyasu. This applies to Satsuma Naminohira Hideyasu during the Eisho era.
From Aoi Art: There is signature “Hideyasu”on front side of Nakago. But it is difficult to read. It looks old and we think it was made in the late Muromachi period. The blade was getting thinner slightly and there seems not to be Shingane. The shape is interesting and it is good for appreciation.
Tsuba: Mokko shape iron Hamidashi Tsuba, cherry blossoms are engraved with silver inlay.
Fuchikashira: Shakudo, grapes are engraved with gold, silver, and copper color.
Saya: Drak brown color.
Menuki: Shakudo, crab is engraved with gold color.
NBTHK Hozon Paper
Aoi Art estimation paper: whole Oshigata.