Fishing type/fish species: Ishidai (striped beakfish), Iso (rock fishing), Boat Hook size: 15 Type: Fishing hook Features: Handmade Tosa hand-forged hook. Handmade. Tankichi Fishing Hooks has a tradition of over 240 years since its establishment in 1781 (Tenmei 1st year), and manufactures fishing hooks specializing in the forging, hand-forging, and handcrafting techniques of Japanese swords. It is the world's oldest fishing hook manufacturer.