Tachi in Shirasaya(NBTHK Tokubetsu Hozon Paper) Signature : Mumei (Ko Naminohira) Sayagaki: Satsuma kuni Ko-Naminohira, almost Ubu Mumei, long classical style. This blade is typical of Ko-Naminohira. This blade is very nice. This blade was made before early Kamakura. by ...