In the old era, Japanese samurai usually carried two knives, one long and one short. The cavalry was a longer Taidao and one threatened warrior, while the samurai was a shorter punching knife and one threatened warrior. Some samurai also chose to bring an extra knife specially for armor piercing. This is a short knife with a blade length of 20 cm. The ridge of the knife is thicker than that of Tatsu Yamashiro. Generally, it does not chop but runs through the weak parts of armor.

However, whether the actual combat theory is threatening or armored will rarely come. (Except for…