Moving to Japan as an international student comes with a long checklist — and health insurance enrollment is one item you can’t afford to skip. Unlike some countries where health coverage is optional, Japan requires nearly all residents, including international students, to enroll in a public health insurance program. This guide walks you through exactly how to do it, what documents you’ll need, and what to expect along the way.
Do International Students Need to Enroll in National Health Insurance?
If you’re staying in Japan on a Student visa for three months or longer, you are legally required to enroll in Japan’s National Health Insurance (NHI, or Kokumin Kenko Hoken) unless you’re already covered by your university’s group insurance plan or another qualifying employer-based plan. Most international students without a Japanese employer fall under the NHI system by default.
This isn’t just a bureaucratic formality — being uninsured in Japan means paying 100% of medical costs out of pocket, which can be extremely expensive even for routine care.
What You’ll Need Before You Go
Gather these documents before heading to your local municipal office:
- Residence card (Zairyu Card) — issued at the airport on arrival or at a later date depending on your entry process
- Passport
- Proof of address / residence registration (usually completed at the same office visit)
- Student ID or certificate of enrollment (some municipalities request this, though not all)
- Personal seal (inkan) or signature — most offices now accept a signature, but check locally
Step-by-Step Enrollment Process
Step 1: Complete Your Residence Registration First
Before you can enroll in NHI, you need to register your address at the ward or city office (kuyakusho or shiyakusho) covering the area where you live. This is typically done within 14 days of moving into your residence.
Step 2: Visit the Health Insurance Counter
Most municipal offices handle residence registration and health insurance enrollment at the same visit, often at neighboring counters or even the same window. Ask staff to guide you — English signage and support vary by municipality, so it can help to have key terms written down (kokumin kenko hoken ni kanyu shitai desu — “I would like to enroll in National Health Insurance”).
Step 3: Submit Your Application
You’ll fill out a simple enrollment form with your basic information. Processing is usually done on the spot, though your physical insurance card may not be ready immediately.
Step 4: Receive Your Insurance Card
In many municipalities, your NHI card is mailed to your registered address within one to two weeks. Some offices issue it same-day. Until it arrives, ask the counter staff for a temporary certificate if you anticipate needing medical care in the meantime — many offices can issue one on request.
How Much Does It Cost?
NHI premiums are calculated based on your income, your municipality, and your age bracket, so the exact amount varies depending on where you live. As a full-time student with little or no income, you are often eligible for premium reductions or exemptions — but this isn’t automatic in every case. Ask the counter staff directly about reduction applications (genmen shinsei) when you enroll, since the process and required documents differ by municipality.
National Health Insurance vs. University Insurance
Some universities offer their own supplementary insurance plans or require enrollment in a university-affiliated program in addition to NHI. These typically aren’t a substitute for NHI but rather a supplement that covers gaps — for example, costs NHI doesn’t fully cover, or support services like translation during hospital visits. Check with your international student office to understand whether your university has such a requirement, and how it interacts with your NHI enrollment.
What If You Miss the Enrollment Window?
If you delay enrollment, you may still be required to pay premiums retroactively from your date of residence registration once you do enroll. There’s no advantage to putting it off — and in the meantime, you’re fully exposed to medical costs if something happens. If you’ve already missed the window, don’t panic: visit your local office as soon as possible and explain your situation.
Quick Reference Checklist
- [ ] Complete residence registration within 14 days of moving in
- [ ] Bring residence card, passport, and student certificate to the municipal office
- [ ] Ask about premium reduction (genmen) eligibility when you enroll
- [ ] Confirm whether your university requires supplementary insurance
- [ ] Request a temporary certificate if you need care before your card arrives
Related Guides
- Health Insurance for International Students in Japan (Complete Guide 2026)
- Is Japanese National Health Insurance Mandatory for Foreigners? (Complete Guide)
Note: Procedures and premium calculation methods can vary by municipality and are subject to change. Always confirm the latest requirements with your local ward or city office.
