Katana in Shirasaya Signature : Sagami koku Zengyo Ju Tsuruoka Hachimangusha mae Okubo Kazuhira (Mukansa) Showa Kinoe-Tora nen Yoshun Kichijitsu(Lucky day, spring 1974) (We divide 4 sections for each sword as Saijyo saku, Jyojyo saku, Jyo saku and regular saku) ...