Melatonin
Melatonin
Melatonin, sold as a supplement in the US, is a prescription-only medicine in Japan and only for children. Adults cannot buy it here, but you may bring your own for personal use under the standard limit (up to 2 months for non-prescription products). The Japanese equivalent for jet lag and insomnia is ramelteon (Rozerem), a prescription melatonin-receptor agonist.
- Prescription status
- Prescription only
- Over the counter
- Not sold OTC
- Bringing it into Japan
- ✓ 1 month Rx / 2 months OTC
- Names abroad
- Melatonin (supplement) · Circadin
Over the counter
Not sold OTC or as a supplement in Japan. The only approved product, Melatobel granules, is for children with neurodevelopmental sleep disorders. Adults are prescribed ramelteon (Rozerem) instead.
Prescription products in Japan
0 productsProducts on Japan's national drug price list. Prescription only: a clinic visit is needed, and pharmacies may substitute a generic with the same ingredient.
| Dosage forms |
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Product names are shown in Japanese, exactly as printed on the package and the prescription. Show this page at the pharmacy.
All listed products (0) · Drug price list as of 2026-08-12
Bringing it into Japan
Up to a 1-month supply of prescription medicine, or 2 months of OTC medicine, without any paperwork. For more, apply for a Yakkan Shoumei (import confirmation) before travel.
Getting it prescribed in Japan
Any clinic can prescribe it after a consultation. Bring the original packaging or a medication list. Use the hospital finder to find clinics with English-speaking staff or an international patient office.
Names abroad
| US | Melatonin (supplement) |
|---|---|
| UK | Circadin |
| Korea | 서카딘 |
| China | 褪黑素（脑白金） |
| Taiwan | 褪黑激素 |
Sources
- Health Insurance Claims Review & Reimbursement Services — Drug master (NHI drug price list) shinryohoshu.mhlw.go.jp — 2026-08-12
- Ministry of Health, Labour and Welfare — Bringing medicines for personal use into Japan mhlw.go.jp
This page describes how a medicine is regulated and sold in Japan. It is not medical advice and does not cover dosing for your situation; follow your doctor's and pharmacist's instructions.