Bringing Insulin to Japan: What's Actually Allowed

Bringing insulin to Japan is legal, and for most travelers it's simple: an injectable drug with its syringe, up to a 1-month supply, is allowed with no certificate — but only if it's a pre-filled syringe or a self-injection kit, such as an insulin pen. Carry a copy of your prescription and a doctor's letter with it even inside that allowance, since customs can ask. Go over a month's supply, and you need MHLW's import certificate arranged before you fly. It's a separate track from ordinary pills, which get their own 1-month allowance — this one exists specifically for insulin, EpiPens, and other self-injected diabetes supplies.

Most prescription medication in Japan is measured on one scale: a 1-month supply, no certificate needed. Injectables get a rule of their own, and it's narrower than it looks — the same cap applies, but only to insulin delivered as a pre-filled syringe or a self-injection kit. That's the format most people already travel with, so in practice it rarely changes anything for someone on a standard insulin pen. Vials drawn up separately sit outside the wording MHLW uses, so confirm with MHLW directly rather than assume your device qualifies.

An EpiPen is an injectable drug with a device, so it's assessed exactly like insulin: a 1-month supply of the auto-injector travels in with your prescription and a doctor's letter, no certificate required. Backup extras that push you over a month's worth are when the import certificate comes in. EpiPens are also available in Japan by prescription, often through allergy specialists or international clinics.

Carrying more than a month's supply of insulin or an EpiPen means applying for the 輸入確認書 (Yunyu Kakunin-sho), the import certificate still commonly called 薬監証明 (Yakkan Shoumei), issued by MHLW. It's the same certificate required for any injectable beyond the standard limits — insulin, EpiPens, and CPAP supplies are the categories MHLW names specifically. Apply through the online portal, the default route since 1 July 2025, at least 14 days before you arrive. Processing runs about 2-3 business days once complete, but build in slack around Golden Week, Obon, or New Year, when it moves slower.

Two regional desks handle applications by arrival airport: Kanto-Shinetsu Regional Bureau for Narita, Haneda, and Kanto ports (yakkan@mhlw.go.jp), and Kinki Bureau for Kansai, Chubu Centrair, Fukuoka, and Naha (kiyakuji@mhlw.go.jp).

Sending supplies ahead instead of carrying them yourself is a different set of rules — see can you mail medication to Japan first. Also traveling with CBD, or checking what else is off-limits? See is CBD legal in Japan and medications banned in Japan. For the broader system — insurance, registering with a doctor, the pharmacy versus drugstore distinction — the health guide and moving to Japan guide go deeper than this page needs to.