Katana: Sirosaya. Signature: Yoshihara Kuniie Saku. Syowa 17 Nen 5 gatsu Kichijitsu. The blade is polished,in a shirasaya. Blade length:67.4 cm or26.54inches. Sori : 2.1cm or 0.827 inch. Width at the hamachi: 3.05cm or 1.2inches. Width at theKissaaki: 2.38 cm ...