It is crucial for a longsword. The spring steel katana can only achieve around 80J (when the core is 57hrc), such as ASTM9260. This model does not use the traditional clay tempering process but employs “vacuum heat treatment” for quenching. The hamon pattern is artificial, added for aesthetic purposes. The blade is not coated black; the color comes from the steel itself. The advantages of modern high-performance materials include increased durability and better edge retention. When testing cutting, it is recommended to cut only bamboo and mats, as these materials prevent the blade from forming V-shaped notches. Once V-notches appear on fully quenched high-performance materials, the fractures can look significant. The tsuka is handmade, providing quick feedback and a perfect fit with the Nakago. The tsuba does not rattle in the habaki. Ito and Sageo are originally imported from Japan. The ito is made of cotton, and the Sageo is made of synthetic silk. The ito features a hishigami lining, enhancing the grip. The blade is made of high-performance steel, perfect for test cutting. Overall, it is a sleek and indispensable katana for practice. We keep the steel composition confidential to avoid imitation by other companies using inferior materials. There are many fake materials in the market nowadays. The following data is provided by a third-party testing agency.
