Katana in Shirasaya (NBTHK Tokubetsu Hozon paper)

Signature : Mumei (unsigned) attributed as Kouda.

The blade was polished.
habaki: gold failed double habaki.
Blade length : 70.0 cm or 27.55 inches.
Sori : 1.6 cm or 0.62 inches.
Mekugi : 3
Width at the hamachi : 2.85 cm or 1.12 inches.
Width at the Kissaki : 1.71 cm or 0.67 inches.
Kasane : 0.79 cm or 0.31 inches.
Era : Late kamakura to early Nanbokucyo period.1334.
Shape : The blade is oosuriage munei(cut shortened).
The sword is regular sized with deeper sori nice looking shape.
Jitetsu :Itame hada well grained with masanagare (mixed massage had) jinie attach and also small chikei.
Hamon : Niedeki suguha and komidare mixed with uchinoke, double hamon, sunagashi, kinsuji.

Special feature : The founder of the Uda school started from Kamakura period by Konyudo kunimitsu.
The sword itself sillier with Norishige.
This blade is typical special feature of Kouda school.
Especially there are many sunagashi and kinsuji scatter in Hamon.

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