As a tool necessary for agriculture, they manufactured sickles and hoes since the Middle Ages. After starting to make Japanese nails as a side business for farmers during the off-season, they began to produce many types of forged bladed tools such as kitchen knives, planes, chisels, pruning shears, carving knives, and axes.
Furthermore, blacksmiths are also able to manufacture tools necessary for the production of forged blades, such as "yattoko" (iron chopsticks), demonstrating that the techniques and skills to consistently produce everything from the finished product to its tools and equipment have been passed down to the present day.

• Technology/techniques/raw materials

  Technology/techniques/raw materials

  Technology/techniques

  1. Forming is carried out by free forging, which involves heating iron or iron and carbon steel in a furnace and then hammering and stretching or widening it.

  2. Blade steel is made by heating iron and carbon steel in a furnace and forge-welding them together by hammering. In this case, for chisels, carbon steel is wrapped around the blade from the tip to the neck and then forge-welded.

  3. The entire axe shall be assembled by simultaneously attaching the head, body, and blade tip.

  4. In the case of Japanese nails, a "shinogi" (ridge) should be attached.

  5. The "coloring" of the wooden shears shall be done by heating them in a furnace before hardening and rubbing them with a silk stick made of bundled silk cloth or a cloth stick made of equivalent material.

  6. For hardening kitchen knives, utility knives, planes, hatchets, and sickles, apply a "mud coating" and then rapidly cool them.

  7. Sharpening, grinding, and finishing must be done by hand.

   

  raw materials

  1. The materials to be used shall be iron or iron and carbon steel.

  2. The handle shall be made of wood.