Koto early Muromachi period (Ouei 23/1416) BizenLength of cutting edge 32.2cm Almost no curvature Width of base 25.5cm Thickness of base 5.5mm
NBTHK(Tokubetsu Hozon) certificate
with)Black lacquered Waist notches Ko'kizami Gold pearl of inlay Fue-maki style stripes scabbard Chi'sa-katana style Koshirae