The blade was polished.
Blade length : 10.3 cm or 4.05 inches.
Mekugi : 1
Width at the hamachi : 1.94 cm or 0.76 inches.
Kasane : 0.54 cm or 0.21 inches.
Era : Middle Muromachi period.
Shape : The blade is Mitsumine style and engraved Bo-hi and soehi and on the back, Suken are engraved.
Jitetsu : Itame had well grained with jinie attach and chikei work visible to see the texture well.
Hamon : Niedeki suguha and Hitatsura hamon with sunagashi and kinsuji.Boshi is komaru boshi and on the back, midarekomi style.
Special feature : I think the signature is not reliable but the sword itself very active nice Jigane and hamon.
I think the Tanto must be Sosyu Hiromasa.
The well grained nice Jigane and active hamon are quite remarkable.
Aoi Art estimatin paper : whole Oshigata
Price: JPY 70,000-. (including shipping and 100% insurance fee)