Unsigned attributed to Ko-Shōami
Sumi-iri rectangular shape, Iron ground, Open work, Hammered surface, Contoured square Mimi edge, Single Hitsuana punch
Muromachi period
77.0mm x 76.0mm 3.8mm thick (Mimi) / 4.0mm thick (Seppa-dai)
NBTHK(Tokubetsu Hozon) certificate