This article provides an overview of the Japanese criminal justice system, including types of crimes, penalties, detention centers, extradition laws, juvenile offenders and recent changes to criminal law. It explains that the police are responsible for investigating crimes and arresting suspects and that those convicted of committing a crime can face fines or long-term imprisonment depending on the type and severity of their offense. Additionally, it details recent changes to criminal law in Japan such as harsher penalties for violent crimes against women/children and new laws allowing victims greater access when filing complaints against offenders.