Tachi in Shirasaya(NBTHK Tokubetsu Hozon Paper) Signature:Yasumitsu. Middle Koto:Jyosaku ranking:OOwazamono cutting test ranking:Bizen. The blade was polished by good polisher. Blade length : 69.6 cm or 27.40 inches. Sori : 2.2 cm or 0.86 inches. Mekugi : 4(3 is open, ...