Katana in Shirasaya(NBTHK Tokubetsu Hozon paper) Signature : Tenpo 11 Koharu Satsuma-shin Okuhira Motohiro (We divide 4 sections for each sword as Saijyo saku, Jyojyo saku Jyo saku and regular saku) This Katana belongs to Jojo-saku ranking. The blade was ...