Legal Status of Peptides
Highly restrictive. Carry a Yunyu Kakunin-sho (import certificate) for any injectable peptides. Japan has very strict pharmaceutical import laws. Many peptides are classified as pharmaceuticals and require pre-approval from the Ministry of Health, Labour and Welfare before entry. Unauthorized import can result in seizure and legal consequences.
Cross-reference this brief with our peptide travel regulations hub for neighbouring jurisdictions.
Airport & Customs Rules
- Apply for Yunyu Kakunin-sho (import certificate) before travel
- Carry all documentation in Japanese and English
- Strict limits on quantities
- Declare all medications
- Some peptides may be outright prohibited
Airport Intelligence
Declaration threshold
Declare any injectable; >1-month supply triggers secondary inspection
Inspection likelihood
HighCommonly confiscated
- Unlabeled vials and lyophilized powders
- Syringes without a doctor's letter
- GHRP / IGF-1 / Melanotan compounds
- Bulk quantities suggesting commercial intent
- Anything missing patient name on the label
Airport-specific notes
- NRT / HND / KIX: Yunyu Kakunin-sho (import certificate) required for injectables
- Apply via local Kōseikyoku office 2–4 weeks before travel
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