Katana in Shirasaya with Koshirae(NBTHK Tokubetsu Hozon paper)(Origami) Signature : Mumei(Osafune Yoshikage) Honami Koson Origami : Mumei (Nagayoshi) middle Koto :Jyo-saku ranking:Oo wazamono cutting test ranking. (We divide 4 sections for each sword as Saijyo saku, Jyojyo saku Jyo saku ...