Katana in Shirasaya(NBTHK Tokubetsu Hozon paper) Signature : Hizen Koku Junin Minamoto Tadayoshi(1st) Shinto: Saijo saku: Saijo Owazamono: Hizen province. (We divide 4 sections for each sword as Saijyo saku, Jyojyo saku Jyo saku and regular saku) This Hizen Koku ...