Katana in Shirasaya (NBTHK Hozon paper)
Signature : Ganroku yo nen Nigatsuhi
Hizan koku Dewa no kami Fujiwara (Yukihiro)
The blade was polished.
HAbaki: Silver single foiled habaki
Blade length : 68.18 cm or 26.84 inches.
Sori : 2.1 cm or 0.83 inches.
Mekugi : 2
Width at the hamachi : 3.03 cm or 1.19 inches.
Width at the Kissaki : 2.15cm or 0.85 inches.
Kasane : 0.74 cm or 0.29 inches.
Era : Edo Kanbun period.
Shape : It is suriage, machiokuri sword
Jitetsu : koitame had well grained with jinie attached. there are chikei
Hamon : Nie base gunome midare with ups and downs.
There are double ha with sunagashi and kinsuji works.
Bo-shi is slight entangled.
Special feature : Hizen koku Dewa no kami Fujiwara Yukihiro is a brother of first generation Masahiro.
He was called Kurobe and has learned western forgin skills.
He was 32 years old at that time.
At Shoho 5th year, he has he has received Dewa Daijyo.
At Tenna 3rd year May, he has passed away at age of 66.
The piece is similar to first generation Masahiro.
The sword style is similar to first generation Masahiro. It seems to look like a summer clouds.
There are active sunagashi, kinsuji seen with ups and downs. The jigane is good with no kizu(flaw).
NBTHK Hozon paper
Aoi Art estimation paper : whole Oshigata.