Katana is a type of sword that was used by the Samurai in Japan. It is characterized by its long, curved blade that has a single edge. This design allows it to be used for both the slashing movements typical of mounted combat and the thrusting movements required for on foot combat. It is traditionally made from a specialized Japanese steel called tamahagane, which results from a traditional smelting process that yields layers of different carbon concentrations, creating a mixture of hard, brittle steel and soft, flexible steel. This allows the smith to produce a well-balanced sword that is capable of both cutting and bending without becoming brittle, as would be the case with a single-edged blade.
To create a katana, the smith starts by heating up and melting the tamahagane. Once melted, the smith then forges the tough, low-carbon steel into a long channel that is snugly fitted to the hard, high-carbon steel. He then hammers the two metals together to form the katana’s core. This process gives the sword its renowned ability to both bend and cut, while at the same time maintaining an extremely sharp edge.
Once the blade has been formed, it is then quenched and hardened in order to make it durable enough for use. The resulting piece of steel is known as the Hamon, a visual wavelike effect that runs along the length of the blade, creating a balance between the hard and brittle steel and the softer, more flexible metal. A katana is usually also decorated with a kozukai, which is typically engraved with the names of Shinto and Buddhist deities or with mantra. When it is not in use, the katana is stored in its sheath, or Saya. This sheath should be carefully handled to avoid damaging the blade’s surface and to prevent moisture buildup that could result in rusting. buy demon slayer katana online