The characteristics change depending on the properties of the ball steel used at that time, but the style I aim for is a baked blade with a wide sword shape in the North and South Korea period.
Many modern swords take the position of ornamental swords, but we are aiming for a sword that will not bend, bend, cut well, and beautify.
Bizen Nagatomi Resident, Sword Crafts Suketada Kikuchi
Tatara iron making is one of the most primitive steel making methods. Impurities are not taken into the interior of steel that is refined by low-temperature reduction of iron sand at a lower temperature than when the iron melts.
Yuchu makes homemade steel using this Tatara steel.