Katana in Shirasaya, with Koshirae (NBTHK Tokubetsu Hozon paper) Signature : Mumei (Shikkake) (We divide 4 sections for each sword as Saijyo saku, Jyojyo saku Jyo saku and regular saku) This Mumei (Shikkake) belongs to Jyojyo saku ranking. The blade ...