Bringing Medicine to Japan: The Banned List, the One-Month Rule, and the Certificate

In this article:

• What Is Prohibited Outright
• The Quantity Rules
• The Import Certificate
• OTC Medicines and Devices
• At the Airport
• Bringing Medicine to Japan: Frequently Asked Questions

Introduction

Japan treats a number of medicines that are unremarkable elsewhere as controlled substances, and it does not make exceptions for tourists who did not know.

Adderall is the clearest example. Doctors prescribe it to millions of people in the United States, but Japan completely prohibits its import. Japan offers no permit, quantity allowance, or process for bringing it in. Authorities have detained travelers over it.

This article sets out the shape of the rules. This is not legal advice, and regulations change. Use this information as a prompt to check the Ministry of Health, Labour and Welfare’s English pages and, if you are carrying a controlled substance, contact the Narcotics Control Department directly. Do that six to eight weeks before you fly.

What Is Prohibited Outright

A short list, and the consequences of getting it wrong are serious.

Stimulants

Japan’s Stimulants Control Act prohibits amphetamine and methamphetamine and their salts entirely. There is no import permit available.

That covers Adderall, Dexedrine, Vyvanse, and equivalent amphetamine-based ADHD medications. It does not matter that you hold a valid prescription in your own country.

Japan separately controls methylphenidate — including Ritalin and Concerta — and generally does not allow travelers to bring it into the country even with a prescription, although different regulations apply. Do not assume Japan allows it simply because it is not an amphetamine.

Atomoxetine, sold as Strattera, is not a controlled substance in Japan and is a possible alternative to discuss with your own doctor well ahead of travelling.

Pseudoephedrine

This is the one that catches ordinary travelers with no controlled prescription at all.

Japanese law classifies pseudoephedrine and related compounds as stimulant raw materials, and prohibits travelers from bringing in products that contain them above specified concentrations. That includes Sudafed and a long list of standard American and British cold and sinus preparations.

Read the ingredient list on any cold, flu, or allergy medicine in your bag before you pack it. If it contains pseudoephedrine, leave it at home.

Japanese pharmacies sell effective cold and congestion remedies. You will not be without options.

Narcotics

Codeine, morphine, oxycodone, and other opioid analgesics are controlled narcotics in Japan. Bringing them for personal use requires advance written permission from the Narcotics Control Department of the relevant regional bureau — a separate process from the general import certificate.

Apply weeks ahead. You can apply in English at no cost, and the process is straightforward, but you cannot complete it at the airport.

Cannabis and any cannabis-derived product, including CBD in many forms, occupies its own category of risk and Japanese law here is considerably stricter than in most Western countries. Do not bring it.

The Quantity Rules

For permitted medicines, the question is how much you are carrying.

One Month of Prescription Medication

Travelers may bring up to a one-month supply of most permitted prescription medicines for personal use without a certificate or any advance paperwork.

This rule covers the great majority of travelers who take ordinary long-term prescription medicines — such as blood pressure medication, statins, thyroid replacement, contraceptives, and antidepressants that are not controlled — on a normal-length trip.

Beyond one month, you need the import certificate described below.

Original Packaging

Keep everything in the original blister packs or pharmacy-labelled bottles, with the label intact showing the drug name and your name.

Loose pills in a weekly organiser are the thing most likely to cause a problem at customs, and the problem is not that they are illegal but that they are unidentifiable. Bring the organiser and the original boxes.

Documentation to Carry

A printed copy of the prescription, and a short letter from your doctor on letterhead stating your name, the condition, the medications by generic name, the doses, and that they are for your personal use.

In English is sufficient. A Japanese translation is helpful and not required.

You will very probably not be asked for any of this. It costs nothing to carry and it resolves a difficult conversation in thirty seconds if you are.

The Import Certificate

Officially the Yunyu Kakunin-sho — an import confirmation. Older material and a great many travel forums still call it a Yakkan Shoumei, which was the previous name, and searching either term will find it.

When You Need One

Broadly: more than one month’s supply of prescription medication, more than two months of over-the-counter medicines, more than 24 units of external-use products or cosmetics, and quantities of medical devices above specified limits.

Also required for certain psychotropic medications regardless of quantity. Narcotics take a different permit from the Narcotics Control Department rather than this one.

If you are on a long stay — a working holiday, a study period, an extended trip — this is the process that applies to you.

How to Apply

You can apply by email to the regional bureau of health and welfare that covers your airport of arrival, and you do not have to pay a fee.

You submit an application form, a copy of the prescription or a doctor’s letter, an explanation of the medication and quantity, and your flight itinerary. The bureau issues the certificate by email and you print it.

The Ministry of Health, Labour and Welfare publishes the forms and English guidance on its website. Use those rather than a third-party summary, including this one.

Timing

Apply at least two to four weeks before departure, and apply even earlier if you plan to bring a controlled substance.

The bureaus generally process applications quickly, but they cannot handle urgent requests, and they may not respond in time if you submit an application only three days before your flight.

There is no way to obtain this at the airport. If you arrive without the required certificate, customs officers may hold or refuse the medication.

OTC Medicines and Devices

The rules extend beyond prescriptions.

Over-the-Counter Medicines

Travelers may bring up to a two-month supply of non-prescription medicines without paperwork, as long as the medicines do not contain banned ingredients.

The ingredient rule matters more than the quantity rule here. An ordinary supermarket cold remedy can contain a prohibited compound, and the fact that shops sell it freely in your home country does not matter.

Paracetamol, ibuprofen, and standard antihistamines are not a problem. Combination cold and sinus products are where to look carefully.

Medical Devices

CPAP machines, insulin pumps, continuous glucose monitors, nebulisers, and similar personal devices come in for personal use, and quantities above defined limits require the import certificate.

Carry a doctor’s letter identifying the device and its medical necessity. For CPAP, bring the prescription or the machine’s documentation.

Travelers should declare syringes and needles and carry a doctor’s letter explaining why they need them. Insulin-dependent travelers do this routinely and it is not a problem when documented.

Supplements and Vitamins

The same quantity limits apply to commercial health products, and customs may treat unusually large quantities as commercial imports rather than personal-use items.

Japan regulates some supplement ingredients that other countries leave unregulated. If you carry anything unusual, check the ingredient.

A normal traveler’s bottle of vitamins is not an issue.

At the Airport

If you prepare properly, you can handle the arrival process smoothly.

Declaring

Japan’s customs declaration, completed on Visit Japan Web before arrival or on a paper form, asks about restricted items. Answer honestly.

Carrying permitted medicine within the quantity allowance does not require a declaration in itself. If you carry anything that requires a certificate, you must declare it and present the certificate.

Presenting the Certificate

Print it. Keep it with your passport, not in your checked bag.

Show it at the customs desk with the medication accessible. Officers process these routinely and the interaction is short.

Carry It, Do Not Check It

Keep your medication in your hand luggage because airlines occasionally delay checked bags, and you cannot show a customs officer medication that is still on the baggage carousel.

This also matters if you are forwarding your suitcase from the airport, which is otherwise an excellent idea.

If Something Is Flagged

Cooperate, calmly and completely. Do not argue the merits of the rule with the officer, who did not write it.

Prohibited items are confiscated. In the case of stimulants and narcotics without permission, the matter can escalate beyond confiscation to detention and prosecution, and your embassy’s ability to help in that situation is limited.

Every embassy with a mission in Japan publishes guidance on this, and reading your own country’s page is worth ten minutes before you fly.

Bringing Medicine to Japan: Frequently Asked Questions

Can I bring two weeks of contraceptive pills without paperwork?

Yes. Oral contraceptives are not controlled substances in Japan and a supply of up to one month may be brought in for personal use with no certificate and no advance application. Keep them in the original packaging with the pharmacy label. If your trip is long enough that you are carrying more than a month’s supply, that crosses the threshold and requires the import certificate — which is a simple free application, but one that must be made in advance.

What happens if I arrive with a prohibited decongestant?

At best, it is identified at customs and confiscated, and you continue your trip having lost a packet of cold medicine. That is the common outcome for someone who packed a standard pharmacy product without checking. The reason to take it seriously is that pseudoephedrine is regulated as a stimulant raw material rather than as an ordinary medicine, and the framework around it is not designed with tourists in mind. Do not attempt to conceal it, do not argue, and do not bring it in the first place — check the ingredient list before you pack and buy an equivalent at a Japanese drugstore instead.

How far ahead should I apply for the import certificate?

Two to four weeks as a minimum for ordinary prescription medicines exceeding the one-month allowance, and six to eight weeks if a narcotic or psychotropic is involved, since that requires a separate permission from the Narcotics Control Department. Applications are free and made by email to the regional bureau covering your arrival airport. There is no expedited route and no way to obtain either document after you land, so build it into the same planning stage as the flights rather than the packing.

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Conclusion

Do one thing today: read the ingredient list on every medicine you intend to pack, and search each active ingredient against the Ministry of Health’s English guidance. That single half-hour resolves almost every version of this problem.

If anything on that list is controlled, contact the relevant regional bureau by email now rather than later. The applications are free and the officials answering them are helpful, and the only thing that cannot be fixed is leaving it until the week before the flight.