This article provides an overview of the items that are not permitted in Japan, including firearms and ammunition, narcotics, psychotropic drugs, ivory and endangered species products, counterfeit goods and products related to child pornography or child exploitation. Additionally, some food items, cultural objects, medicines and drugs, and other items may require a permit or special permission before they can enter the country. It is important for travelers to understand what is not allowed in order to avoid any potential issues at customs when entering or leaving Japan.