Katana in Shirasaya, with Koshirae (NBTHK Tokubetsu Hozon paper) Signature : Kiku mon Oumi Kami Minamoto Hisamichi (1st generation) (We divide 4 sections for each sword as Saijyo saku, Jyojyo saku Jyo saku and regular saku) This Oumi Kami Minamoto ...