Katana in Shirasaya Mukansa sword smith. Guarantee NBTHK Hozon paper. Signature : oite To-to Sakai Ikkansai Shigemasa Seitan. Ko-ki 2629Nen Mi Tori 1 Gatsu hi.(1969 January) (We divide 4 sections for each sword as Saijyo saku, Jyojyo saku Jyo saku ...