Naminohira Yukiyasu 波平行安 signed, Early Muromachi period, with Certificate

Shakudo Gunbai Fuchikashira (赤銅軍配図縁頭).
Gold inlay Butterfly Tsuba (金象嵌蝶図鍔).
Silver Habaki with family crest (井筒紋/Izutsu).
Nihon Token Hozonkai Certificate included (日本刀剣保存会).

平造り、庵棟、中心区送り、鑢不明。
板目流れる、細直ぐ刃、鋩子地蔵駆け出す。
室町時代初期。

Signature : Naminohira Yukiyasu
Nagasa : 273mm (10.75 in.) 
Sori : 0mm (0.0 in.) 
Total length : 500mm (19.69 in.) 
Motohaba : 22.9mm (0.90 in.) 
Sakihaba : 14.8mm (0.58 in.) 
Motokasane : 5.2mm (0.20 in.) 
Sakikasane : 3.2mm (0.13 in.) 
Blade Weight : 140g
Total Weight : 395g