Japan has strict regulations on imported goods, and it is important to know what cannot be shipped into the country. Prohibited items include food and agricultural products, weapons and explosives, drugs and narcotics, cultural artifacts, hazardous materials, counterfeit items, cigarettes and tobacco products, certain medications, military equipment, plastic waste, and pornography. Failing to comply with these restrictions can result in severe penalties including imprisonment or fines. It is recommended to check with the relevant authorities before attempting to ship any items into or out of Japan.