Can You Bring Prescription Medicine into Japan?

Most travelers can bring a normal trip-sized supply of prescribed medicine into Japan, but the familiar advice to “keep it under one month” is only the first screen. Japan classifies medicines by their active ingredients and legal category. A medicine that is routine in your country may be a psychotropic, narcotic, stimulant, stimulant raw material or prohibited substance under Japanese law.

The safest sequence is: identify every active ingredient, calculate the total amount you will carry, check Japan’s controlled-substance list, and complete any required approval before departure. Do not rely on a brand name, a foreign prescription or an airline’s acceptance as proof that the medicine is legal to import.

Rules checked: September 16, 2026. Medicine regulations can change, so reopen the official pages before your flight.

Start with the ordinary quantity limits

For medicines that are not subject to stricter controlled-substance rules, Japan’s Ministry of Health, Labour and Welfare (MHLW) allows certain personal-use quantities to be cleared by Customs without obtaining an Import Confirmation in advance.

These limits are based on the stated dosage, not simply the number of boxes. A bottle containing 30 once-daily tablets is one month’s supply; several packages can still exceed the limit when their contents are added together.

The table is not a shortcut around controlled-drug law. If an ingredient is regulated separately, that stricter rule wins even when you carry less than one month. Injectable medicines and quantities above the general limits can also require an Import Confirmation. Check with the responsible authority rather than assuming that a doctor’s letter replaces approval.

Search by active ingredient, not brand name

Brand names change by country and can hide combinations of several ingredients. The Narcotics Control Department (NCD) publishes its controlled-substances list by substance, not by every product sold worldwide.

Use the generic or active ingredient printed on the pharmacy label. If a product combines two or more ingredients, check each one. Also record:

• the strength per tablet, capsule, patch, milliliter or dose;
• the number of units you will carry;
• the prescribed daily dose;
• whether the medicine is injectable; and
• whether you will leave Japan with any unused controlled medicine.

If the ingredient name is unclear, ask the prescribing doctor or pharmacist. Do not try to classify a medicine from its purpose alone: two treatments for the same condition may fall into different Japanese legal categories.

Controlled medicines follow a different decision tree

The NCD divides controlled substances into categories including narcotics, psychotropics, stimulants, stimulants’ raw materials, cannabis and opium. The required procedure depends on that category.

Narcotics and stimulants’ raw materials

A traveler carrying a medicine classified in Japan as a narcotic or a stimulant raw material needs advance permission. The NCD gives examples such as morphine, fentanyl, oxycodone and codeine for narcotics, and lisdexamfetamine or pseudoephedrine for stimulants’ raw materials. Examples are not a complete list, so use the current official list.

The application normally requires import paperwork, a medical certificate from the prescriber, and information or photographs showing the medicine’s name and strength. The NCD says travelers should apply at least 14 days before travel and warns that last-minute handling, particularly by the Tokyo office, cannot be assumed.

If you plan to take leftover medicine out of Japan, check whether an export application is also required. Carry the issued certificate and be ready to present it to Customs.

Psychotropics

Psychotropics have substance-specific quantity thresholds. According to the NCD, a listed psychotropic at or below its table threshold, when it is not injectable, does not require NCD permission or a doctor’s certificate under the Narcotics and Psychotropics Control Law.

Above the listed threshold, or for an injectable form, medical documentation is required. Bringing more than one month’s supply into Japan also brings the separate Import Confirmation rules into play. Check both the NCD table and the MHLW personal-import limit; passing one test does not automatically pass the other.

Prohibited substances

Some substances cannot be carried by an individual traveler even when they were legally prescribed abroad. The NCD specifically lists heroin, opium powder, methamphetamine, amphetamine—including dexamphetamine—and methaqualone as prohibited for this route.

This distinction matters for ADHD treatment. The NCD’s current FAQ says Adderall cannot be imported because it contains amphetamine. It separately says lisdexamfetamine products such as Vyvanse may be imported only after advance permission as a stimulant raw material. Similar medical use does not mean similar import status.

Cannabis products and other designated substances can create additional problems. Do not assume that a product is acceptable because it is sold legally, labeled CBD, available over the counter or prescribed where you live. Check the exact ingredients and the current Japanese classification.

What an Import Confirmation does

An Import Confirmation is evidence from MHLW that the planned personal import does not violate the pharmaceutical import rules. It is generally relevant when you exceed the quantity allowed for Customs-only clearance or carry a medicine or dosage form that specifically requires it.

MHLW provides an online Import Confirmation system. Use the official application route linked from the ministry’s personal-import guidance. Controlled narcotics and stimulants’ raw materials use the NCD permission process instead; some travelers may need to consider both pharmaceutical-import and controlled-substance requirements.

Do not wait until airport check-in to solve this. Your airline decides what may be carried safely on board, while Japanese authorities decide what may enter the country. Those are separate questions.

Pack for inspection, delays and lost luggage

Keeping medicine identifiable makes a Customs question easier to resolve. A sensible travel file includes:

1. the medicine in its original labeled packaging;
2. a copy of the prescription;
3. a short doctor’s letter showing your name, diagnosis or treatment need, generic ingredient, strength, dose and total quantity;
4. any Import Confirmation or NCD import/export certificate; and
5. a saved offline copy of the relevant official guidance.

Original packaging and a doctor’s letter are good practical precautions, but they do not legalize a prohibited ingredient or replace permission where permission is mandatory.

Keep essential medicine in your hand luggage when aviation security and storage requirements allow it. Do not place every dose in checked baggage that could be delayed. At the same time, confirm the airline and airport security rules for liquids, needles, syringes, cooling packs and battery-powered medical devices.

For regulated controlled medicine, the NCD says the traveler must carry it personally: it cannot be sent separately or entrusted to a family member. Do not mail a replacement supply to Japan without first checking the import rules.

A five-minute preflight check

Before you finalize the trip, work through this list:

• Ingredient: Do I know every active ingredient?
• Classification: Is any ingredient on Japan’s controlled or prohibited lists?
• Quantity: How many days and how much total medicine am I carrying?
• Form: Is anything injectable, liquid, a patch or supplied with a needle?
• Permission: Do I need an Import Confirmation, NCD permission, medical documentation or an export certificate?
• Timing: Have I allowed at least 14 days when NCD permission is required?
• Evidence: Are the labels, prescription, doctor’s letter and approvals accessible offline?

Complete arrival paperwork separately through Visit Japan Web; registering there does not approve medicine. Save Japan’s emergency numbers as well, especially if interruption of treatment could become urgent.

When the classification is uncertain, ask the appropriate MHLW regional bureau or NCD office before traveling and provide the generic ingredient, strength, dosage form and total quantity. A precise question gets a safer answer than “Can I bring my prescription?”