Koto End of Muromachi period (Eiroku era/circa 1558-) MinoLength of cutting edge 29.5cm Curvature 0.3cm Width of base 26.8mm Thickness of base 6.1mm
NBTHK(Hozon) certificateNBTHK(Koushu Tokubetsu Kicho) certificate
with) Black lacquered wrinkles leather wrap Chi'isa Katana-style KoshiraePreserved in a Shirasaya Sayagaki written by a living National Treasure Hon'ami Ni'shu