Sugata (Blade style): Hand-forged curved blade with narrow Hi (groove) on both sides which ends by the middle of the blade and a wider Hi that ends 19 cm from the Habaki. The blade is sharp on both sides from this point onwards. The blade spine is iori-mune, the edge is without Niku (cutting sharp blade). Folded Steel (C45, C55Si7- USA: Steel 1095, C105 W2). The hardness of its Mune is ca 40° and the Ha (blade edge) is ca 60° HRC Rockwell 13 times folded to achieve ca. 8192 layers. Traditional clay-wrapping technique for differential hardening. There are beautiful hada (grain in steel, pattern of folding the steel) in the blade.