ICHIMAI BOSHI(一枚帽子)

What is Ichimai Boshi(一枚帽子)? Ichimai Boshi refers to a BOSHI(帽子), located where KISSAKI(切先) is fully or almost fully hardened. In some cases, the outline of Boshi is more often found near [...]

HAGIRE(刃切れ)

What is Hagire(刃切れ) ? Hagire refers to a crack in the blade. A crack in the KISSAKI(切先) is called Karasu-Guchi(鳥口) also, which literary means a crow’s beak.

MISHINA BOSHI(三品帽子)

What is Mishina Boshi(三品帽子)? Mishina Boshi refers to a BOSHI(帽子) ,which curves inward but the top is pointed. This Boshi was developed by Mishina school(三品派).

FUKURA(ふくら)

What is Fukura(ふくら)? Fukura refers to the fine edge line of the KISSAKI(切先). The rounded one is described as Fukua-Tsuku, the reduced one is Fukura-Kareru.