Wakizashi in Shirasaya
Signature : Mumei(attributed as Sekisyu school)
Sayasyo by Dr Fukunaga Suiken : Sekisyu Dewa Jyu Naotsuna Oosuriage Mumei Naginata nosh Eiwa koro the length of the blade 1syaku 8 sun 4Bu han aru no.
Sekisyu Dewa Jyu Naotsuna was one of the qo students of the Masamune and well known sword smith among the Samurai’s reputation.
The blade looks like old ancient Samurai ‘s brave warrior.
The blade was polished.
Habaki : Navy Minatogawa jinjya sword habaki.
Blade length : 55.9 cm or 22.00 inches.
Sori : 1.5 cm or 0.59 inches.
Mekugi : 1
Width at the hamachi : 3.02 cm or 1.18 inches.
Width at the Kissaki : 2.75 cm or 1.08 inches.
Kasane : 0.85 cm or 0.33 inches.
Era : Early Muromachi period.period.
Shape : The blade is wide and thick with ookissaki gorgeous healthy nagamaki.
Jitetsu : Ooitame had well grained with jinie attach and visible to see the texture well.
Hamon : Niedeki suguha and noter and also gunome midair mix with ash, sunagashi and also Kinsuji work.
Boshi is midarekoimi style.
Special feature : Well known sword jidje Fukunaga Suiken who passed away wrote the Sayagaki.
But I think the sword is a stream of Sekisyu school not so old like Naotsuna.
The blade a stream of Sekisyu school.
The blade is ooitame had and active hamon. probably Sekisyu school or shimada school.
Aoi Art estimation paper : whole Oshigata.