Shin-shin-to End of Edo period (circa Ansei 4/1857) BushuLength of cutting edge 29.3cm Curvature 0.3cm Width of base 29.3mm Thickness of base 7.0mm
NBTHK(Tokubetsu Hozon)reported in the book ofBuzen-no-kami Fujiwara KIYONDO
with)Kuro'ro-iro lacquered waist Kizami/Samidare summer rain notches Denchu style KoshiraeSayagaki written by Dr. Sato Kanzan "Minare'Sao"