Katana in Shirasaya with Koshirae (NBTHK Hozon Paper)

Signature: Mumei (unsigned) (Sekishu Naotsuna)(Chu-koto, Jo-josaku ranking)

The blade was polished .
Blade length : 69.0 cm or 27.16 inches.
Sori : 1.9 cm or 0.74 inches.
Mekugi: 3
Width at the hamachi : 2.89 cm or 1.13 inches.
Wide at the Kissaki : 1.83 cm or 0.72 inches.
Kasane : 0.65 cm or 0.25 inches.
Era : Nanbokucho period.
Shape : This blade is regular sized Katana with rather long kissaki.
Jitetsu : Itamehada well grained with Jinie and Chikei attach. It is black Jitetsu looks like a Kitaguni blade.
Hamon : Niedeki Gunomemidare. In Ha, there are Ashi and muchi Sunagashi and Kinsuji.

Special feature : The founder of the Naotsuna was a student of the Masamune which is called Masamune 10 Tetsu.
He was called as one of the menber.

This blade was fantastic work of Naotsuna.
And activities in Ha are very attractive.

Koshirae :
Tsuba : On the Shakudo Tsuba, waves are engraved. And Karakusa pattern is colored with gold color iroe.
The rim is line is engraved.
Fuchikashira :On the Shakudo plate, waves are engraved. And oar is colored with gold color iroe.
Saya : Black Ishimeji Saya.
Menuki : On the Shakudo plate, carp is engraved.

NBTHK Hozon Paper
Aoi Art estimation paper : whole Oshigata.