Japan has stricter medication rules than most countries. Some common Western drugs are controlled or prohibited. Here is what you can bring, what requires advance permission, and how to prepare.
Japan’s pharmaceutical regulations apply to visitors as well as residents, and they catch travellers by surprise more often than almost any other entry rule into Japan. Medications that are legal and widely available at home, including some common cold remedies, certain prescription pain medications, and ADHD drugs, are either controlled or outright prohibited in Japan.
This is not a bureaucratic edge case. People are detained at Japanese airports for medication violations every year, including tourists who had no idea their prescription was an issue. Read this guide before you pack.
General Principles
Japan’s Ministry of Health, Labour and Welfare (MHLW) divides medications into three categories for import purposes:
- Permitted (no restriction): Standard prescription and over-the-counter medications for personal use, within reasonable personal-use quantities (generally up to 2 months’ supply for non-controlled drugs).
- Quasi-drug or controlled (yuishutsu inkoku hitsuyou): Medications that require an import certificate (yunyu kakuninsho) from MHLW before arrival. This includes stimulants (amphetamines), some sedatives, and certain opioids.
- Prohibited (absolutely cannot bring): Heroin, cocaine, cannabis, MDMA, and other narcotics are banned regardless of prescription status in your home country.
Common Medications That Are Prohibited in Japan
Stimulants (Kakuseizai)
Japan has a zero-tolerance policy on stimulant drugs. This is the most important category for Western travellers:
- Adderall (amphetamine salts): Completely prohibited in Japan. Carrying Adderall into Japan, even with a valid US or Canadian prescription, is a criminal offence. There is no import permit available for amphetamine-based ADHD medication. Do not bring Adderall to Japan.
- Methamphetamine-based medications: Also prohibited.
If you use Adderall for ADHD, consult your doctor before your Japan trip. Alternatives such as Strattera (atomoxetine) or Concerta (methylphenidate) may be importable with permits see below.
Cannabis-based medications
CBD products, medical marijuana, and cannabis-derived medications are prohibited in Japan regardless of their legal status in your home country. This includes CBD oil, cannabis gummies, and THC products. Japan’s cannabis laws apply at the border.
Medications That Require an Import Certificate (Yunyu Kakuninsho)
The following medication types can be brought to Japan but require advance approval from the Japanese Ministry of Health, Labour and Welfare. Apply at least 2 to 3 weeks before travel at the MHLW website (in English at mhlw.go.jp):
- Methylphenidate (Ritalin, Concerta): Controlled in Japan. Requires a yunyu kakuninsho for personal import. Bring your prescription and apply online.
- Opioid pain medications: Codeine, tramadol, oxycodone, and morphine-based drugs require an import certificate for quantities over a 2-week supply. For up to 2 weeks of codeine-based cough syrup or pain relief, standard personal-use rules may apply, but check in advance.
- Benzodiazepines: Diazepam (Valium), lorazepam (Ativan), and similar drugs are in Japan’s controlled substance category. Personal use for up to 1 month may be acceptable with prescription documentation, but an import certificate provides certainty.
Common Medications That ARE Allowed
- Pseudoephedrine: Unlike Korea, Japan generally allows standard pseudoephedrine-based cold medications in personal-use quantities. Check the current MHLW list for updates to regulations.
- Standard antidepressants (SSRIs and SNRIs): Permitted for personal use with prescription documentation.
- Blood pressure, diabetes, and cholesterol medications: Permitted for personal use.
- Standard pain relief (ibuprofen, paracetamol/acetaminophen): Permitted.
- Antihistamines: Permitted.
Practical Rules for Bringing Any Medication to Japan
- Keep all medications in the original pharmacy packaging with the original label.
- Carry a copy of the prescription or a letter from your doctor confirming the medication, dosage, and that it is for personal use.
- Bring no more than a 2-month supply of unrestricted medications without additional approval.
- Use the MHLW import certificate system for any controlled or borderline medications the application is online and in English.
- Declare medications at customs if you are uncertain. The red lane exists for honest questions.
What to do if you need controlled medication in Japan: Contact the MHLW import narcotics section at least 3 weeks before travel. They are responsive, and the English-language guidance at mhlw.go.jp is clear.
Buying Medication in Japan
Japan has excellent pharmacies (yakkyoku) in every city, stocked with Japanese equivalents of most common medications. If your medication is not available in Japan, a Japanese pharmacy can supply it locally, which is useful if you need to extend your trip or lose your medication. Many Japanese pharmacy staff speak basic English in tourist areas.
Japan’s convenience stores also stock basic pain relief, cold remedies, and stomach medications at low prices.
