The blade was polished.
Blade length : 26.1 cm or 10.27 inches.
Sori : Uchizori.
Mekugi : 1
Width at the hamachi : 2.45 cm or 0.96 inches.
Kasane : 0.65 cm or 0.25 inches.
Era : Late Edo period.
Shape : The blade is rather wide and thick Kanmuri otoshi style.
Jitetsu : Koitame hada well grained with jinie attach with chikei work.
Hamon : Niedeki suguha boshi is round shape with deep nioikuchi.
Special feature : Yamato kami Yukiyasu was a latest stream of the Yukiyasu.
He engrave his name as 63th grand child of Yukiyasu.
He was a son of the Yasutoshi and made sword very thick wide and thick sword generally.
This sword looks a copy of the Kamakura period Kanmuri otoshi style.
Saya : black roar saya.
Menuki : On the shakudo nanako plate, a turtle is engraved with gold color.
Kozuka : On the nice syakudo nano plate, autumn leaved and a turtle are engraved with gold color.
NBTHK Hozon paper
Aoi Art estimation paper : whole Oshigata.