Tanto in Koshirae Osorakuzukuri style.
Signature: Sesshu ju Minamoto Kuninaga
Joukyou 4nen 8gatu Kichijitsu.
The blade was polished.
Habaki : Copper single habaki.
Blade length : 29.5 cm or 11.61 inches.
Sori : 0.8 cm or 0.31 inches.
Width at the hamachi : 3.17 cm or 1.24 inches.
Kasane : 0.64 cm or 0.25 inches.
Era : Edo Jokyo period.
Shape : The blade is rather wide and thick, Osoraku Zukuri shape very rare style. In both sides of the blade, there are double Hi and on the Sashiura, Bonji is engraved.
Jitetsu : Itame-hada well grained with Jinie attach.
Hamon : Niedeki Ko-gunome Midare style.
Special feature : Sesshu Ju Minamoto Kuninaga is well known sword maker.
This blade is very rare Osoraku Zukuri shape.
Shimada school and Kiyomaro school made these kind of shape.
Saya : Kawarinuri saya.
Aoi Art estimation paper : whole Oshigata.