Some over-the-counter medicines including types of inhalers, allergy and sinus medications are illegal in Japan. Specifically, products that contain stimulants or Codeine are prohibited if it contains more than an allowed quantity of the stimulant ingredient. This includes medicines that contain Pseudoephedrine, such as Actifed, Sudafed, and Vicks inhalers.
According to Japanese law, up to a two-months’ supply of allowable over-the-counter medication or vitamins may be brought with travelers.
Heroin, cocaine, MDMA, opium, cannabis (marijuana), stimulant drugs including some prescription medications such as Adderall are prohibited in Japan. There are no exceptions in bringing these prohibited medications into Japan, even if the medication is legally obtained outside of Japan.
Japanese customs officials or police can detain travelers importing prohibited items.
Up to one month’s supply of prescription medicine (that is allowed by Japanese law) can be brought into Japan. Travelers should bring a copy of their doctor’s prescription as well as a letter stating the purpose of the drug. Those who must carry more than one month’s supply, or are carrying syringes (pumps) or a CPAP machine, must obtain a Yakkan Shomei, a type of import certificate, in advance and present the certificate with your prescription medicines at Customs.
As the list of allowable medicine is subject to change, we strongly recommend that you visit the Ministry of Health, Labour and Welfare’s website and contact them via email to confirm that your medications are allowed in Japan.