The origin of this kind of kendo: First, the beginning of kendo Japan has used swords since ancient times. Among many weapons, the sword is particularly valued because of its two meanings. First, the sword is the soul of a weapon and an essential tool for defense or attack. Because it is an indispensable thing in combat, its usage has been studied since ancient times. With the change of using method, the making of sword has also changed, which is a remarkable fact from the history of sword. Another meaning of the sword is symbolic utility, such as prayer, sacrifice and sacred protection. It is not difficult to understand by studying ancient myths and legends. As one of the three artifacts (the symbol of the throne, the three treasures inherited by Japanese emperors), such as praying or wishing and offering swords to gods, appointing generals and giving swords. , are proof of this meaning. Before Japanese knives evolved into modern forms, China knives were mostly used in ancient Japan. In the 10 century, Japanese history was the politics of aristocratic center. Political chaos, so local tyrants had to gather to practice martial arts in order to defend their country, and samurai was born. The samurai then devoted themselves to the improvement of swords and guns, because China's sword was changed to Japanese sword. In the first nine years and the last three years of Anping period, as well as during Baoyuan Pingzhi Rebellion, Japan's unique swordsmanship was formed through increasing actual combat experience. That is the foundation of Japanese kendo today. These histories also influenced the making of swords. The former straight China sword was replaced by the Japanese sword with ridges or bends. By the middle of heian period, it had become a pure Japanese Dao. The appellation of ancient swords is called or. The word fencing has existed since Nara's time, but its pronunciation is still or. In the Anping era, it was called.