There are prohibitions and restrictions for some goods sent to Japan. These include: • Heroin, cocaine, MDMA, opium, cannabis, stimulants, psychotropic substances, and other narcotic drugs (excluding those designated by Ministry of Health, Labour and Welfare Ordinance); • Firearms (pistols, etc.), ammunition (bullets) thereof, and pistol parts; • Explosives (dynamite, gunpowder, etc.); • Precursor materials for chemical weapons; • Germs which are likely to be used for bioterrorism; • Counterfeit, altered, or imitation coins, paper money, banknotes, or securities, and forged credit cards; • Books, drawings, carvings, and any other article which may harm public safety or morals (obscene or immoral materials, e.g., pornography); • Child pornography; • Articles that infringe upon intellectual property rights. Source: customs.go.jp