This study is investigated the Japanese language usage policy that Japan carried out in the colony. As a result, it can be seen that, first of all, it was a policy that was forced by the Japanese language usage policy implemented by Japan and abroad. The students were forced to use the Japanese language regularly through dialect tags, punishment cards, etc., which had a strong relationship with grades and commendations, and they were overwhelming. Secondly, the Japanese-language policy that Japan carried out in the colonies was cruel, as it was forced to receive it through differentiation. As an example, the “Japanese language regular family” is a sneaky system that provides various benefits, deprives the public of their hearts, and raises their knees in front of economic benefits. Because I was able to go to migrant inland, I had to accept it. Thirdly, the Japanese language usage was a policy that was thoroughly made according to the needs of Japan. In order to secure the necessary human resources for recruitment in accordance with the Wartime General Mobilization Order, they forced the use of Japanese. On the other hand, when examining the colonial language policies of the powers, they expanded various policies, the UK changed the language according to the governing country, and France implemented the language policy most similar to Japan. The Netherlands implemented a foolish policy, and the United States implemented a language policy with the principle of autonomy. In other words, in the case of the British colonial language policy, which is the most common in France and France, and the British who discriminate against those who speak the language, when the powers rule the colony, the language is the best. Obviously, as a great weapon, it influenced the lives of the people.