How much melatonin can I bring to Japan?

One month supply without permit. Source: Japan Customs (Ministry of Finance).

What documentation do I need for melatonin in Japan?

Yakkan Shoumei for larger quantities.

ITEM RULE · TRAVELING

RESTRICTED

Melatonin 🇯🇵 Japan

Q: Can I bring Melatonin to Japan?

Not sold in Japan — personal import permitted Melatonin is classified in Japan as an ingredient that has not been approved as a medicine under the Pharmaceutical and Medical Device Act (PMD Act). The Ministry of Health, Labour and Welfare permits personal-use import up to a two-month supply without a Yakkan-Shoumei certificate. Larger quantities — or any product marketed with medical claims — require the Yakkan-Shoumei importer's certificate, submitted at least two weeks before travel to the relevant regional Bureau of Health. Keep original labelling showing the dose and manufacturer; customs officers routinely inspect supplement quantities.

RESTRICTEDVERIFIED · 2026-05-13NOT YET GRADED

Report a correction

Not sold in Japan — personal import permitted

ANSWER

Can I bring Melatonin into Japan?

RESTRICTEDVERIFIED · 2026-05-13

Not sold in Japan — personal import permitted

QUANTITY / LIMITS

One month supply without permit

DOCUMENTS

Yakkan Shoumei for larger quantities

DECLARATION

Required at the destination customs authority

SOURCE

mhlw.go.jp

Verify against the official customs authority before acting on this answer.Report a correction

Full details

Melatonin is classified in Japan as an ingredient that has not been approved as a medicine under the Pharmaceutical and Medical Device Act (PMD Act). The Ministry of Health, Labour and Welfare permits personal-use import up to a two-month supply without a Yakkan-Shoumei certificate. Larger quantities — or any product marketed with medical claims — require the Yakkan-Shoumei importer's certificate, submitted at least two weeks before travel to the relevant regional Bureau of Health. Keep original labelling showing the dose and manufacturer; customs officers routinely inspect supplement quantities.

ENFORCEMENT

Occasional — Enforcement reported intermittently.

PRACTICAL ADVICE

Carry original retail packaging + prescription if dispensed Rx. Personal-use 30-90 day supply clears with documentation.

OFFICIAL SOURCES · VERIFIED 2026-05-13

mhlw.go.jp japan.travel

RULE DETAILS

QUANTITY LIMITS

One month supply without permit

DOCUMENTATION REQUIRED

Yakkan Shoumei for larger quantities

LEGAL REFERENCE

Pharmaceutical and Medical Device Act

CUSTOMS AUTHORITY

Japan Customs (Ministry of Finance)

SHOW AT CUSTOMS

Printable customs card →

AIR TRAVEL IS SEPARATE

This page covers destination customs rules in Japan. Whether you can carry melatonin through security, in carry-on, or in checked baggage depends on airline and screening rules — see air travel rules.