作为剑，日本刀在锋利和切割能力上无可匹敌，而且它特别擅长切开金属。然而

As a sword, the Japanese sword is unmatched in sharpness and cutting ability, and it is particularly good at cutting metal. However, medieval armor is also known for being good at fighting cutting, and even in the movie it is not easy to see a man hiding behind a shield or two-handed giant sword. The blade of the Japanese sword has a sharp bevel to make it powerful. It has a thick wedge shape, and the cut material still needs to be squeezed out during the cutting process. This cutting is of course devastating to the flesh and blood. The blow, but it is much less efficient when it comes to fighting armor. After discovering this, the development direction of some Japanese swordsmanship schools changed from cutting the armor to trying to pierce the joints and remove them, just like the Europeans deal with their own full body armor. Except for the foreign civilizations exchanged in Korea and the encounter with the Mongols, the Japanese sword has always developed itself in a relatively isolated environment. It is not the so-called "ultimate sword" touted by some enthusiasts. The powerful edge of the Japanese sword needs to be continuously re-polished in order to cut it into an oblique shape, and it will break like other swords. It is not designed to be abused, and neither has the flexibility of use, nor is it really necessary to deal with both soft and hard armor as the medieval sword had to do.

As a sword, the Japanese sword is unmatched in sharpness and cutting ability, and it is especially good at cutting metal. However, medieval armor is also known for its ability to fight cutting, and even in movies, it's not easy to see someone cutting away from behind a shield or two handed sword. The Japanese sword has a sharp slope to make it powerful. It has a thick wedge. In the process of cutting, it still needs to squeeze out the cut material. This kind of cutting is a devastating blow to the flesh and blood of course, but it is much more inefficient in fighting against armor. After discovering this, some Japanese swordsmanship schools turned from cutting armor to trying to pierce the joints and remove them, just like the European way of dealing with their own body armor. In addition to the foreign civilization and the encounter with Mongols in Korea, Japanese Dao has always developed itself in a relatively isolated environment. It is not the so-called "ultimate sword" touted by some enthusiasts. The powerful edge of the Japanese sword needs to be polished again and again in order to cut it into an oblique shape. It will also break like other swords. It is not designed to be abused, and it has no flexibility in use. It is not necessary to deal with hard and soft armor at the same time as the medieval sword had to do.<br>

As a sword, Japanese Dao is unmatched in sharpness and cutting ability, and it is especially good at cutting metal. However, medieval armor is also famous for its good resistance to cutting, and even in movies, it is not easy to see a man hiding behind a shield or a sword with two hands. The blade of Japanese sword has a sharp inclined plane, which makes it strong. It has a thick wedge shape, but the cut material still needs to be squeezed out in the cutting process. This kind of cutting is a devastating blow to flesh and blood, but it is much less efficient in resisting armor. After discovering this, the development direction of some Japanese swordsmanship schools changed from cutting armor to trying to stab into the joints and remove them, just like the European way of dealing with their own whole body armor. In addition to the foreign civilizations exchanged in Korea and the encounters with Mongolians, Japanese Dao always develops itself in a relatively isolated environment. It is not the so-called "ultimate sword" touted by some fanatical advocates. The powerful edge of Japanese Dao needs to be polished again and again in order to make it easy to cut, and it will break like other swords. It is not designed for abuse, and it has no flexibility in application, and it really does not need to deal with both soft and hard armor as medieval swords have to do.