Katana in Shirasaya, with Koshirae (NBTHK Tokubetsu Hozon Paper) Signature : Oumi Daijyo Fujiwara Tadahiro. (We divide 4 sections for each sword as Saijyo saku, Jyojyo saku, Jyo saku and regular saku) This sword belongs to jyo-Jyo saku ranking. The ...