This article provides an overview of the prohibited food items and other restricted items that are not allowed in Japan's customs. Fruits and vegetables that have not been grown or processed in a controlled environment, meat products such as beef jerky or smoked meats, dairy products such as cheese, fish products such as canned tuna fish or smoked salmon, and alcoholic beverages containing more than 1% alcohol by volume (ABV) are all strictly prohibited from entering Japan. Additionally, firearms & ammunition, plants & plant products, drugs & narcotics, pornography, animals, and counterfeit goods may also be restricted depending on their purpose of use or origin of manufacture. It is important for travelers visiting or leaving Japan to familiarize themselves with its customs regulations before travelling so that they can avoid penalties for bringing forbidden items across borders illegally.