1. Different curvatures

1. Tang knives: Some Tang knives have curvature, but it is much lower than the curvature of Japanese knives, and some have no curvature at all.

2. Japanese swords: The blades of Japanese swords are curved. Japanese swords are made by families. After each knife is made, the swordsman will print a symbol like a trademark on it. ?

2. Different hardnesses

1. Tang Dao: The average hardness of Tang Dao is about 60, and the angle of the edge of Tang Dao is relatively wide.

2. Japanese knives: The average hardness of knives made by the Japanese is between 58 and 60.

3. Different characteristics

1. Tang Dao: Tang Dao pursues both sharpness and armor-piercing ability. On the battlefield in ancient China, the blade encountered a breast shield and a bronze helmet. Things like that are commonplace. Faced with this situation, the blade cannot simply pursue sharpness, but must also take into account armor-piercing capabilities.

2. Japanese knives: Japanese knives mainly pursue sharpness. On the Japanese battlefield, metal armor is definitely a rarity. The main job of Japanese knives is to "cut meat". Naturally, the sharper the better. ?