Katana : Mumei (Hizen Yukihiro)
Katana in Shirasaya, with Koshirae. (NBTHK Tokubetsu Kicyo paper)
Signature : Mumei (Hizen Yukihiro)
Shinto : Josaku : Hizen
The blade was polished
Habaki : Silver single foiled habaki
Blade length : 65.9 cm or 25.94 inches.
Sori : 1.4 cm or 0.55 inches.
Mekugi : 3
Width at the hamachi : 3.0 cm or 1.18 inches.
Width at the Kissaki : 2.13 cm or 0.84 inches.
Kasane : 0.67 cm or 0.26 inches.
Era : Edo period Kanbun(1661-1672)
Shape : It is o-suriage mumei sword with bohi engraved.
It is normal width and thickness
Jitetsu : Koitame hada well grained with jinie attached.
It is clear konuka hada with with clear jigane.
Hamon : Consisted in nie structure, the nioiguchi is deep with ashi well attached with sunagashi and kinsuji.
Boushi is round end.
Special feature : The sword is mumei however, it is attributed as Hizen Dewa no kami Fujiwara Yukihiro.
At first glance, it seems to be a suriage from koto period however,
it is originally shinto sword with hi engraved and inlayed as koto.
He was formerly active as a swordsmith of Nabeshima family.
At that time, he used the western iron that the Nabeshima family imported.
He has made many swords until his death on Genroku 14th（1701） year at age of 69.
Tsuba : Oval shape iron tsuba with pattern engraved.
Fuchikashira : Shakudo nanakoji plated with dragon design engraved.
Saya : Black lacquer saya
Menuki : On shakudo plate, lion design is engraved and inlayed with gold.
NBTHK Tokubetsu Kicyo Token
Aoi Art estimation paper : whole Oshigata.