And material selection. Japanese knives are all family style. For example, the famous "Zhengcun Dao" is called the Demon Dao. Every Japanese knife is carefully made by the master of knife work, and it will bear the family symbol like a trademark. Therefore, Japanese knives are better than tangdao steel, and the manufacturing process is also good. And the grip is different. Tangdao holds it with one hand, so the handle will bend inward and the length is shorter than that of Japanese Dao. Japanese Dao is held in both hands, so the handle is straight and long. . . . That's all I know