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
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
Shin-shin-to End of Edo period (Ansei 6 - Bunkyu 2 /1859-62) KagaLength of cutting edge 28.5cm Curvature 0.2cm Width of base 28.0mm Thickness of base 5.6mm
with)Black Stone surface lacquered scabbard Aikuchi style Koshirae