Katana in Shirasaya, with Koshirae(NBTHK Tokubetsu Hozon paper) Signature : Bishu Osafune Junin Yokoyama Sukemune saku (We divide 4 sections for each sword as Saijyo saku, Jyojyo saku Jyo saku and regular saku) This Yokoyama Sukemune belongs to Jyojyo saku ...