Japanese ornamental hairpin “Kanzashi” has variation such as Tama, Makie, Hirauchi, Yuremono, Musubi. It is able to classify into three such as “Bachi”, “Bo”, and “Tsumami”. Hirauchi is kind of Bo Kanzashi which uses for accent as plus alpha.

Hirauchi Kanzashi has plain circle decoration on its head and as same as other Bo Kanzashi, it has earpick. The Hirauchi uses for scratch with, pick ear, fix hair, etc. And also, in a novel uses as paper knife, and a TV program series of famous samurai good guy and bad guy, a craftsman uses a sharp metal Bo Kanzashi as an arm.