Can I Bring Prescription Medicine to Japan?

Yes, most prescription medicine can be brought to Japan, but only up to a one-month personal supply without paperwork. Larger amounts or injectables need a Yunyu Kakunin-sho import certificate arranged before travel. Narcotics and psychotropics need separate advance permission, and some drugs, like amphetamines, are banned entirely.

Key restrictions

Up to a 1-month personal supply of most prescription medicine allowed without paperwork.

More than 1 month's supply requires a Yunyu Kakunin-sho (import confirmation certificate) obtained before travel.

Injectable medicines need certification regardless of quantity, except pre-filled self-injection kits like insulin within limits.

Narcotics (e.g. morphine, codeine above thresholds) and psychotropics need separate advance permission from the Narcotics Control Department.

Stimulants such as amphetamines (Adderall) are banned outright — no exemption with a prescription.

Carry medicine in original packaging with a copy of your prescription or doctor's letter.

Why this matters

Japan regulates imported medicine far more tightly than most countries, and the rules apply to tourists as well as residents. Medicines that are routine at home — strong painkillers, ADHD medication, some cold remedies — can be restricted or outright illegal in Japan. Ignorance of the rules is not accepted as an excuse, and penalties for bringing banned substances can include arrest, so it pays to check every medication before you fly.

Restrictions

The framework works on supply length and drug class:

Up to 1 month's supply of most prescription medicine: allowed without paperwork. Keep it in original packaging and carry your prescription or a doctor's letter.
More than 1 month's supply: requires a Yunyu Kakunin-sho (import confirmation certificate, formerly Yakkan Shoumei) applied for through MHLW before travel.
Injectables: need certification regardless of quantity, with an exception for pre-filled self-injection products such as insulin pens within the one-month limit.
Narcotics and psychotropics (certain opioid painkillers, sedatives, ADHD medicines): need separate advance permission from Japan's Narcotics Control Department, with their own forms and lead times.
Banned substances: stimulants such as amphetamine and methamphetamine — including Adderall — cannot be imported at all, even with a valid prescription.

What the official guidance says

The Ministry of Health, Labour and Welfare publishes the personal import rules and runs the online Yunyu Kakunin-sho application system. Their guidance is clear that quantities above the personal-use thresholds, and any controlled substances, need approval before arrival — not at the airport. Customs officers make the final decision, so conservative quantities and complete documentation are your best protection.

Frequently asked questions

What is a Yunyu Kakunin-sho?

It is an import confirmation certificate (formerly called Yakkan Shoumei) issued by Japan's Ministry of Health, Labour and Welfare. You apply online before travel and show the certificate at customs. It is required for more than one month's supply of prescription medicine and for most injectables.

Do I need to declare my medication at Japanese customs?

A normal one-month supply of permitted prescription medicine does not need a formal declaration, but you should carry it in original packaging with your prescription. Anything covered by a Yunyu Kakunin-sho or narcotics permit must be presented when asked.

Can I bring insulin and needles to Japan?

Yes. Pre-filled self-injection medicines such as insulin pens are allowed for personal use within a one-month supply without certification. Larger quantities or other injectables need a Yunyu Kakunin-sho.