Katana in Shirasaya with Koshirae(NBTHK Tokubetsu Kicho paper) Signature : Mumei (Ko-Namihira) Sayagaki: Sasshu Namihira, Mumei, blade length is 67.27cm. There are many nice work in Ha. by Fukunaga Suiken (Kao) in December 1971. (We divide 4 sections for each ...