Japan’s National Health Insurance: What You Need to Know (2025 Guide)
New in Japan and wondering how health insurance works? This simple, friendly guide explains Japan’s National Health Insurance (NHI/NHIS) in plain English—who must enroll, how premiums work, what’s covered, how to use your card, and what to do when you leave.
National Health Insurance in Japan explained
Japan has two main public health insurance systems:
- Employees’ Health Insurance (EHI) for most full-time salaried workers (your company enrolls you).
- National Health Insurance (NHI, often called NHIS in English) for residents who are self-employed, students, part-time, between jobs, or dependents not covered under EHI.
If you’ll live in Japan for more than three months on a residence status (student, worker, spouse, etc.), you’re generally expected to be in one of these public systems. Tourists are not eligible.
NHI is run by your city/ward office. You’ll get a health insurance card you show at clinics and hospitals. In most cases, you pay 30% of the bill at the counter and insurance covers the rest. There’s also a monthly out-of-pocket cap for very high bills (more on that below), which limits your costs and protects you from big hospital expenses.
As you read, you’ll see links to deeper, related guides (e.g., private insurance, claims, English-speaking hospitals). They’re part of a content cluster we purposely built around this pillar to make your first months in Japan easier.
NHI vs Employees’ Health Insurance
Here’s a quick at-a-glance comparison so you can tell which path likely applies to you:
| Situation | Likely plan | What you do | Quick notes |
|---|---|---|---|
| Full-time salaried employee (standard contract) | EHI | Employer enrolls you automatically | Dependents can be attached under your company plan. |
| Self-employed, freelancer, contractor, part-timer with no EHI | NHI | Enroll at city/ward office | Premiums are set by your municipality. See “How premiums work.” |
| Student (language school, university) without employer EHI | NHI | Enroll at city/ward office | Many cities offer reductions for low income/students. |
| Between jobs or lost EHI | NHI | Switch within 14 days | Ask about unemployment reductions if you qualify. |
| Dependent spouse or child not covered by EHI | NHI | Enroll each family member | NHI is individual; each member gets a card and is counted for premiums. See “Family members & dependents.” |
| Short stay (tourist) | — | Use travel insurance | Tourists are not eligible for public insurance. Consider travel health cover. |
Want to compare care settings? Read Clinics vs Hospitals in Japan to choose the right place for each need.
Who must enroll and when
If NHI applies to you, enroll within 14 days of one of the following:
- Registering your address after moving into a Japanese municipality
- Losing employer insurance (resignation, contract end)
- Changing status (e.g., becoming a student or self-employed)
Where to go: your city hall (or ward office in big cities).
Bring: Residence Card, passport, proof of address (e.g., lease or juminhyo), MyNumber if issued, and any loss-of-EHI letter if you just left a company plan.
Tip: If you’re waiting for your MyNumber, your city can still start NHI; they’ll update details later.
If you delay enrollment, premiums can be back-charged to the date you became eligible—so it’s better (and cheaper) to go early.
Planning your first days? Our City Hall 101 checklist shows where NHI fits among other new-resident tasks.
How premiums work in 2025
NHI premiums are not one flat price. They’re calculated each fiscal year by your municipality using a formula that typically includes:
- Income-based portion (previous year’s Japanese income)
- Per-person portion (how many insured members are in your household)
- Household equalization portion (a small base amount per household)
- Add-ons for national long-term care insurance if you’re in the age group that pays it
Five helpful realities:
- Local differences: Premium rates vary by city/ward. When you move, your premium can change even if your income doesn’t.
- Previous-year income: If you just arrived and had no prior Japanese income, your first year is often lower (but the next year reflects your earnings).
- Reductions/exemptions: Low-income households, students, and people who recently lost a job can often apply for reductions. Ask at the counter.
- Prorating: Premiums are monthly. If you enroll mid-year, you’ll pay only for months you’re covered.
- Back-billing for late notice: If you forget to enroll (or forget to quit when you leave Japan), the office can bill back to the date you should have been on/off the plan.
Freelancer or independent contractor? Pair this guide with Health Insurance for Self-Employed Expats in Japan for money-saving strategies and paperwork tips.
What NHI covers and what it doesn’t
Japan’s public insurance is broad, but not everything is covered. Use this table to set your expectations.
| Category | Typical coverage under NHI | What you usually pay | Often not covered |
|---|---|---|---|
| Doctor visits (internal medicine, pediatrics, etc.) | Covered for medically necessary care | ~30% at the counter | Non-medical certificates, some optional tests |
| Prescription medicines | Covered when prescribed | ~30% | Brand-name drug upcharge if a cheaper generic exists; over-the-counter products |
| Dental care | Basic dentistry (fillings, extractions), periodontal care | ~30% | Cosmetic work, teeth whitening, some orthodontics |
| Vision | Medical eye care (infections, disease) | ~30% | Routine vision tests for glasses, contact lenses |
| Mental health | Psychiatry, counseling by medical clinics | ~30% | Some private therapy services |
| Maternity | Prenatal care partially subsidized by local vouchers; delivery itself is not an insured medical act unless complications | Out-of-pocket, but see lump-sum childbirth allowance under benefits | Private room upgrades, doulas |
| Rehab/physiotherapy | Physician-prescribed sessions | ~30% | Spa-type services without a medical order |
| Vaccines | Routine public-health vaccines for children; adult shots depend on city | Usually free/reduced for kids; variable for adults | Many travel vaccines |
For dental/vision specifics, see Dental and Vision Care in Japan. For mental wellness resources, see Mental Health for Expats.
How to use your NHI card at clinics and pharmacies
- Choose a clinic or hospital. Smaller clinics are great for colds, common issues, and follow-ups. Hospitals handle specialists and complex care. If you prefer English, check our lists of English-speaking hospitals in big cities.
- Show your card at reception. You’ll fill a short form the first time.
- Pay your portion (usually 30%). Keep the receipt; it lists the points billed.
- Take your prescription to a pharmacy (yakkyoku). Tell them if you accept generic (they’ll often ask).
- Update your address on your NHI record if you move; your card may be reissued.
Need help in English at a large hospital? Many have International Patient Services desks.
After hours, use late-night clinics and 24-hour pharmacies for urgent but not life-threatening issues; dial 119 for an ambulance in an emergency.
High-Cost Medical Expense cap
Japan protects residents from huge hospital bills through the High-Cost Medical Expense system. When your monthly copays exceed an income-based threshold, the extra amount is reimbursed.
Two practical tips:
- Ask for a “Maximum Copayment Certificate” (gendo gaku tekiyō ninteisho) before a planned hospital stay or surgery. Show it at billing so you pay less upfront.
- If you paid the full 30% already (e.g., emergency, card issue), you can file a post-treatment claim with your city.
We walk through claim forms and timelines in Claiming Health Insurance Reimbursements in Japan and Understanding Japanese Medical Bills and Insurance Claims.
Extra benefits you should know about
- Lump-sum childbirth allowance: A one-time payment to offset delivery costs (amount is nationally set and may change; your city will confirm).
- Travel between months: Caps are per calendar month; long stays that cross months can be capped twice.
- Medical transport: Ambulances are free to use in Japan, but NHI doesn’t cover private non-emergency transport.
- Second opinions: Common at larger hospitals; NHI covers medically necessary consultations ordered by your doctor.
Expecting a baby? See Pregnancy and Childbirth in Japan for prenatal vouchers, hospital booking, and postnatal checks.
Family members and dependents
With NHI each person enrolls individually, but premiums are calculated at the household level. That means:
- A non-working spouse and children still enroll in NHI (not as “free dependents” like under many company EHI plans).
- If your spouse gets a full-time job with EHI, they’ll switch to EHI, while you and the kids can remain on NHI—or join as EHI dependents if you meet EHI rules.
For step-by-step instructions, see Adding Family Members to Your Health Insurance in Japan (Dependent Coverage).
Self-employed, students and digital nomads
- Self-employed/freelancers: Keep good records. Your final tax return affects next year’s NHI premium. Our Health Insurance for Self-Employed Expats guide explains standard documents, reduction requests, and common mistakes. (Internal link)
- Students: Language schools and universities often explain NHI during orientation, but you enroll at city hall. Ask about student reductions and low-income exemptions.
- Digital nomads/remote workers: NHI covers care inside Japan. If you travel abroad, pair NHI with travel insurance for trips outside Japan. Compare options in Private Health Insurance and Clinics for Expats in Japan and Insurance Tips for Digital Nomads in Japan.
Telemedicine, health screenings and English help
- Telemedicine: Remote consults have grown—handy for refills and minor issues. See Telemedicine in Japan to learn how to book and what platforms work well for English speakers.
- Full-body health screenings (ningen dock): These popular checkups are often partially insured only if medically necessary; the comprehensive packages are usually private. Read Full-Body Health Screenings in Japan to compare options.
- International Patient Services: Many large hospitals offer English support for bookings, billing, and interpreting.
What to do when you leave Japan or switch plans
You must tell your city when you:
- Leave Japan permanently (return your NHI card and settle remaining premiums)
- Move to a new city/ward (re-enroll there)
- Switch to EHI through a new employer (return your NHI card; your company plan starts on its enrollment date)
If you’re leaving Japan, also see our finance posts on Getting Your Pension Refund and the Leaving Japan Financial Checklist for closing accounts and deposits. (Internal links)
Frequently asked questions
Do I need NHI if I already have good international insurance?
If you’re a resident for 3+ months, you’re generally expected to join the public system (NHI or EHI). Many expats keep private insurance as a top-up for private rooms, English-only clinics, or travel outside Japan. See Private Health Insurance and Clinics for Expats in Japan to compare.
What if I enroll late?
City halls can bill back to your eligibility date. If you were uninsured during that period, apply anyway—being enrolled protects you moving forward and may unlock a reduction.
Can I choose any hospital?
Yes, you can go to most clinics/hospitals that accept insurance. For specialist hospitals, you might need a referral (or pay a small first-visit surcharge without one). Our post on Foreigner-Friendly Hospitals Beyond Tokyo helps you pick in major regions.
Will NHI cover braces or cosmetic dentistry?
Cosmetic care is usually not covered. Start with Dental Care Beyond Basics: Braces and Implants in Japan to understand what’s private vs covered.
Does NHI cover mental health?
Yes, medically necessary psychiatric care is covered; some private therapies may not be. See Mental Health for Expats for English providers.
Are travel vaccines covered?
Often not; they’re usually private. Check Travel Vaccinations for Japan before international trips.
How do I claim if I forgot my card at the visit?
Pay out-of-pocket, then ask the clinic for a receipted itemized bill and file a reimbursement at city hall. See Claiming Health Insurance Reimbursements for the form walk-through.
Can NHI refuse me due to pre-existing conditions?
No—public insurance is not risk-priced. Your premium is based on income and household, not your medical history.
What if I work part-time for a big company?
Some part-timers qualify for EHI depending on hours and company size. If not, you’ll be on NHI. Check with HR.
What if I’m moving cities next month?
Enroll now where you live; when you move, quit NHI at your old city and join at the new city. Premiums will update to the new city’s rates.
NHI enrollment checklist
| Step | What to prepare | Where | Tip |
|---|---|---|---|
| 1 | Residence Card, passport, proof of address (lease or juminhyo) | City/ward office | Go within 14 days of address registration or losing EHI. |
| 2 | MyNumber (if issued) | City/ward office | If you don’t have it yet, ask them to update later. |
| 3 | Proof of losing company insurance (if applicable) | City/ward office | A letter from your former insurer speeds things up. |
| 4 | Bank details (optional) | City/ward office | Set up auto-debit so you don’t miss premium payments. |
| 5 | Ask about reductions | City/ward office | Students/low-income/unemployment may qualify. |
| 6 | Ask for Maximum Copayment Certificate if planning surgery | City/ward office | Reduces your upfront payment at the hospital. |
Smart ways to lower your costs legally
- Bring your NHI card to every visit to avoid paying full price by mistake.
- Say yes to generic drugs unless your doctor advises otherwise.
- Use clinics for common issues; hospitals for referrals or complex care.
- Group appointments (e.g., checkups) on the same day to avoid multiple first-visit fees.
- Ask for municipal screening programs (many cities subsidize cancer/health checks on a schedule). See Cancer Screenings in Japan to plan your year.
When private insurance makes sense
Public insurance is your base in Japan. Private plans can still be smart if you want:
- Direct English-language care at international clinics that may not fully accept NHI
- Private rooms and upgrades during hospital stays
- Worldwide coverage when you travel outside Japan
- High limits for rare, very expensive events
Compare options (and how they work with NHI) in Private Health Insurance and Clinics for Expats in Japan.
Quick troubleshooting
- Lost card? Report it at city hall for a reissue; bring ID.
- Moved? File move-out/move-in notifications; NHI is local to your city.
- Name change? Update your Residence Card first, then your NHI record.
- Premium too high? Ask about installments or apply for a reduction if eligible.
- Bills look huge? Don’t panic—check whether the hospital forgot to apply your NHI card or whether it’s a private item. Our Medical Bills & Claims guide shows what to look for. (Internal link)
