Katana in Shirasaya, with Koshirae (NBTHK Tokubetsu Hozon Paper)

Signature: Mumei (Unsigned) Ko Mihara

The blade was polished.
Habaki : Gold foiled and shakudo double habaki.
Blade length : 67.4 cm or 26.53 inches.
Sori : 1.4 cm or 0.55 inches.
Mekugi : 2
Width at the hamachi : 3.00 cm or 1.18 inches.
Width at the Kissaki : 2.05 cm or 0.80 inches.
Kasane : 0.59 cm or 0.23 inches.
Era : Late Kamakura period.
Shape : The blade is oosuriage mumei (cut shortened) with rather thick and wide and longer Kissaki nice looking shape.
Jitetsu : Itame hada well grayed with jinie attach visible to see the texture.
On the Ji, sirake utsuri appear.
Hamon : Niedeki suguha and brush up boshi.

Special feature : Komihara school was working at Bingo province and Aoe school was working at Bitchu province which is next country of Bingo.
I think these school were contacted each other so the jigane is very cloth.
From latter Kamakura to Nanbokucho period, it is said Komihara and after Nanbokucho period, we can say Mihara and late Muromachi is said Sue mihara.
The quality is big difference between these era.
The blade is healthy and good work. Kissaki area looks like Aoe style.

Koshirae : Vvery good condition Kawari kosirae (a copy of the Momoyama koshirae).
Tsuba : On the round shaped shakudo nananko plate, rim is covered by gold color.
Fuchikashira : On the iron plate, aoe leaves are engraved with gold color. signature : Oomura Sadakatsu.
Saya : On the gold nashiji, kiku flowers are painted by gold make.
Menuki : On the shakudo plate, some design is engraved with gold color.

Historical background: 1335,Engen no Ran: inland war occurred.

NBTHK Tokubetsu Hozon Paper
Aoi Art estimation paper : whole Oshigata.