MumeiNanbokuchō Period (1333-1392), circa 1360NBTHK Jūyō Tōken-Nagasa [length]: 69.6 cmSori [curvature]: 1.4 cmMotohaba [bottom width]: 3 cmSakihaba [top width]: 2.3 cmMotokasane [bottom thickness]: 2 mm-Sugata [configuration]: Shinogi-zukuri, maru-mune. The blade is wide, with a slight difference between top and bottom, thick kasane, high shinogi, slightly deep sori, ō-kissaki (5.6 cm)Kitae [forging pattern]: Itame hada mixed with frequent mokume hadatachi. Jinie, fine chikei, pale utsuriHamon [tempering pattern]: Ko-notare mixed with ko-gunome, kaku-gunome, ko-choji and togarigokoro....