This article explores the laws and regulations surrounding self-defense in Japan, including what kinds of self-defense are allowed and how to legally defend oneself. Self-defense is legal in Japan provided that it does not cause any serious injury or death and does not involve the use of weapons without a permit from the police department. Individuals who are found guilty of illegally using self-defense can face severe penalties under criminal law including fines and/or imprisonment depending on the severity of their actions.