Long taper to achieve reliable hooking up and a sharper hook point. In addition, the smooth shape that eliminates sharp corners enhances the springiness (restoring force) of the hook itself and enhances the penetrating power by the returning force of the hook itself. The deep fluffing roller holds the fish firmly, and the point where it is slightly swung in the direction of Nemuri reduces the disintegration, and the hardened hardening reduces the weak point "stretching" of the thin shaft hook.