Japan Health Insurance for Foreigners: A Complete Guide

Overview of Japan's Health Insurance System

Japan operates a universal health insurance system — everyone who lives in Japan legally for more than 3 months, including foreigners, is required to enrol in some form of health insurance. This is a legal obligation, and the premiums and paperwork follow you regardless: failing to enrol leaves you liable for backdated premiums and can weigh against you at a visa renewal.

Japan's health insurance falls into two main categories:

Workplace Social Insurance (健康保険 / 社保)

For full-time employees and qualifying part-time workers employed by a company:

• Both the employer and employee contribute roughly half each
• Premiums are deducted directly from your paycheck
• Covers both health insurance and Employee's Pension Insurance (厚生年金)
• Dependents can be enrolled for free under the dependent coverage system (扶養者制度)
• Managed by Kyokai Kenpo (全国健康保険協会) or a company-specific health insurance union

National Health Insurance (国民健康保険 / 国保)

For all residents not enrolled in workplace social insurance, including:

• Self-employed workers and freelancers
• Working holiday participants
• Unemployed individuals
• Part-time workers whose hours don't qualify for workplace coverage
• Newly arrived individuals not yet employed

National Health Insurance is administered by each municipality — premiums and calculation methods vary by location, and some cities levy it as a tax (国民健康保険税) rather than a premium.

Comparison

Who Needs to Enroll in National Health Insurance

The following foreigners must enrol in National Health Insurance (国保):

• Foreigners whose period of stay is more than 3 months (including working holiday visas)
• Those not enrolled in workplace social insurance through an employer
• Enrolment must be completed at the same time as, or right after, resident registration (住民登録) — and legally within 14 days of becoming eligible

💡 If you're on a working holiday and working part-time at a restaurant, convenience store, etc. (not as a regular full-time employee), you typically won't be enrolled in social insurance by your employer — in that case, you enrol in National Health Insurance yourself.

When You Don't Need to Enroll in National Health Insurance (国保)

• Already enrolled in social insurance through an employer
• Residence status of less than 3 months (short-term visitor)
• Holding a diplomatic or official visa

How Premiums Are Calculated

National Health Insurance premiums are composed of several components, with calculation methods varying slightly by municipality:

Premium Components

1. Income component (所得割): Based proportionally on the prior year's income (January–December)
2. Per-capita component (均等割): A fixed amount for each enrolled person
3. Household component (平等割): A fixed amount per household (in some municipalities)

Premium Estimates (Tokyo 23 Wards, 2026)

Newly arrived foreigner with no prior-year income:

• Per-capita component (均等割) plus household component: roughly ¥60,000–¥70,000/year in the 23 wards
• Income component (所得割): ¥0 (no prior-year income)
• Low-income reductions usually apply in the first year, cutting the household and per-capita components by 70%, 50% or 20%
• Monthly: often ¥2,000–¥6,000 once the reduction is applied — first-year premiums are relatively low

Annual income of ¥3,000,000:

• Income component (所得割) + per-capita component (均等割) combined: approx. ¥180,000–¥240,000/year
• Monthly: approx. ¥15,000–¥20,000

Annual income of ¥5,000,000:

• Combined: approx. ¥300,000–¥400,000/year
• Monthly: approx. ¥25,000–¥33,000

⚠️ Premium cap: National Health Insurance has an annual ceiling set by law. For FY2026 it is ¥1,130,000 in total — ¥670,000 for medical benefits, ¥260,000 for the late-stage elderly support contribution, ¥170,000 for the long-term care contribution (ages 40–64 only), and ¥30,000 for the child and childcare support contribution, a new category introduced in FY2026.

Paying Late Is Expensive

Enrolment is not something you can put off without cost. The 14-day deadline is a legal one, and when a notification arrives late the insurer still backdates the premium to the day you became eligible — in principle for up to two years of unpaid coverage. Someone who ignores the paperwork for a year can therefore receive a bill for twelve months of premiums at once.

Reduction Programs

Low-income enrollees can apply for premium reductions:

• Households with income below a certain threshold can have their per-capita component (均等割) and household component reduced by 70%, 50%, or 20%
• Those with income that has sharply dropped due to unemployment or similar circumstances can apply for special reductions
• You must proactively apply at the ward office — the reduction is not applied automatically in every municipality

Enrollment Process

Where to Apply

Go to the National Health Insurance counter at the ward office (区役所) or city hall (市役所) in your area of residence.

Required Documents

1. Residence Card (在留カード): Must have completed resident registration (with address filled in on the card)
2. Passport
3. My Number notification (if you have one)
4. Personal seal (印章): Some ward offices require this

Step-by-Step Process

1. Go to the ward office and tell the staff you want to enroll in National Health Insurance: 「国民健康保険に加入したいです」
2. Complete the enrollment application form
3. Submit your Residence Card and other documents
4. Receive your qualification certificate (資格確認書) — the document that replaced the paper insurance card (保険証), which Japan stopped issuing on 2 December 2024 — or have your My Number Card registered as a health insurance card (マイナ保険証)
5. You'll later receive a premium payment notice

💡 When completing your resident registration (転入届), ward office staff will usually ask at the same time whether you'd like to enroll in National Health Insurance — you can handle both at once. See also: Your First Week in Japan: The Complete Checklist.

How to Pay Premiums

• Payment slip (振込用紙): Pay at a convenience store or bank using the slip sent to you
• Automatic bank debit (口座振替): Link a Japanese bank account for automatic payment (see Opening a Bank Account in Japan)
• Credit card: Supported by some municipalities

How to See a Doctor

Step 1: Choose a Hospital or Clinic

Japan's medical facilities are categorized as:

• Clinic (診療所 / クリニック): Similar to a GP's office; go here first for general conditions
• Hospital (病院): Larger facilities; you typically need a referral letter (紹介状) from a clinic. Without one, hospitals with 200 or more beds charge a 選定療養費 of roughly ¥5,000, rising to about ¥7,700 at university-level (特定機能) hospitals

Step 2: Check In (受付)

At the reception desk, show your My Number health insurance card (マイナ保険証) or your qualification certificate (資格確認書) and fill out the intake form (問診票, for first visits). Intake forms are usually in Japanese; some hospitals provide English or other language versions.

Step 3: See the Doctor

The doctor examines you and writes a prescription. Japan operates a separation of prescribing and dispensing — you pick up medications at a separate pharmacy (調剤薬局) outside the hospital.

Step 4: Pay

• With insurance, your out-of-pocket rate is 30% (for those under 70)
• Example: ¥10,000 medical bill → you pay ¥3,000
• Medication fees are separate but also subject to 30% co-payment

Fee Reference

High-Cost Medical Expense System (高額療養費制度)

If your out-of-pocket medical expenses in a single month exceed a certain threshold, you can apply for a High-Cost Medical Expense (高額療養費) refund.

For people under 70 on standard income:

• Monthly cap for treatment from 1 August 2026: approximately ¥85,800 + (total medical costs − ¥286,000) × 1%, plus a new annual ceiling of ¥530,000; before that date the cap was ¥80,100 + (total medical costs − ¥267,000) × 1%
• 多数回該当 (once you have had three or more such months in the last 12) stays at ¥44,400
• The amount exceeding this cap can be claimed as a refund from the ward office or your insurance union

Better still, you should not have to pay it and wait. If you obtain a limit application certificate (限度額適用認定証) from your insurer before treatment, the hospital bills you only up to the cap in the first place. Since 2021 you can also authorise sharing your limit information through your マイナ保険証 registration instead of carrying the paper certificate.

This system is what keeps serious illness or a long hospital stay from becoming a financial catastrophe.

What to Do About Your Home Country Health Insurance

Before going to Japan, you need to decide how to handle the health insurance you have in your home country.

Residency-Based Systems (UK, Australia, most EU)

If your home country operates a residency-based national health system, your coverage may lapse automatically once you're no longer a resident. Check with your national health authority before leaving to confirm your status.

Optional Suspension Systems (rare, and shrinking)

A few countries still allow you to apply to pause coverage and stop paying premiums while abroad, but the trend is in the opposite direction. Taiwan is the clearest example of a system that has just closed this door:

• Taiwan NHI (全民健康保險): The general suspension and resumption mechanism (停保／復保) was abolished on 23 December 2024. Anyone who still holds Taiwanese household registration must keep paying NHI premiums while living abroad, however long they stay away. Only those whose registration is formally moved out (除籍, after two years abroad, for example) can withdraw — and on returning and re-registering, they must wait six months before NHI coverage resumes.

→ See: Managing Your Home Country Health Insurance When Moving to Japan

Private Insurance (e.g., USA)

If your coverage is through a private insurer or employer, contact them directly. Most plans do not cover long-term care abroad. You may need to cancel or let coverage lapse when you leave, then re-enroll upon return.

Key Principle Regardless of Home Country

You must enroll in Japan's health insurance system. Home country insurance is almost never usable for routine care in Japan. Whatever you decide about your home coverage, Japan enrollment is not optional.

Do Working Holiday Participants Need Extra Travel Insurance?

What 国保 Covers

Once enrolled in National Health Insurance, your basic medical care in Japan is covered (30% co-pay). But 国保 does not cover:

• ✗ Overseas emergency evacuation and medical repatriation
• ✗ Accidental death and disability
• ✗ Personal liability (e.g., accidentally damaging someone else's property)
• ✗ Lost or stolen luggage
• ✗ Self-pay items like orthodontics

Recommended Additional Coverage

1. Comprehensive travel or expat insurance: Covers medical, accidents, lost luggage, personal liability
2. Global expat providers: World Nomads, SafetyWing, IMG Global, Cigna Global
3. Japan-based foreigner medical insurance: Available locally after arrival

Premium estimates (annual):

• Global travel insurance (1 year): approx. USD $400–$800 depending on coverage level
• Japan-local annual plan: approx. ¥50,000–¥80,000

💡 At minimum, carry a basic policy covering medical and accidents. National Health Insurance covers most everyday medical costs, but additional insurance provides critical protection for emergencies like evacuation or repatriation.

Common Questions

Q: What document proves my insurance if paper cards no longer exist?

Japan stopped issuing new paper insurance cards (保険証) on 2 December 2024, and cards already in circulation expired on 1 December 2025. Two things replaced them:

• マイナ保険証 — your My Number Card registered as a health insurance card, used by scanning or sliding the card at the clinic reception terminal
• 資格確認書 — a paper qualification certificate your insurer issues so that anyone without a registered My Number Card can still receive insured treatment

Your insurer or ward office issues the 資格確認書 automatically once you enrol; if you switch insurers, a new one follows. Either route gives you the same 30% co-payment.

Q: Can I be treated without insurance?

Yes, but you pay the full fee. Without insurance, a simple consultation with medication commonly runs ¥6,000–¥15,000, and anything involving imaging, surgery, or a hospital stay scales into the hundreds of thousands of yen. Enrolling is not optional and not expensive — the cheapest route is always to be insured.

Q: I moved — what happens to my insurance?

Insurance follows your registered address, not the municipality:

1. If you move between municipalities, you leave one scheme and join another — file a loss of qualification notice (資格喪失届) at the old office and enrol again at the new one, both within 14 days
2. A new qualification certificate (資格確認書) is issued by the new insurer
3. If you move within the same municipality, only the address change is filed

Do not skip this. Moving without updating the address on your マイナ保険証 can mean the health insurance function stops working at the clinic counter.

Q: I can't read Japanese — how do I see a doctor?

Use these resources:

• AMDA International Medical Information Center: Multilingual medical consultation — phone 03-6233-9266
• JNTO's multilingual hospital search system
• Large hospitals often have medical interpreter services — ask when booking
• Download a translation app as backup — Google Translate's camera mode works well for intake forms

Final Takeaway

Which insurance you are in, and whether you actually enrol, decides what you pay for medical care in Japan. Employees are signed up by their employer at roughly half the cost; everyone else — working holiday makers, students, freelancers, the newly arrived — joins National Health Insurance (国保) at the ward office within 14 days of finishing resident registration.

Premiums follow the previous year's income. A first year with no Japanese income is cheap; the second year is not, because your first full year of salary sets the bill. Plan for that jump rather than being surprised by it.

At the counter you pay 30%, and the high-cost medical expense system caps a bad month at around ¥85,800 for a standard income (treatment from 1 August 2026). Keep your マイナ保険証 or 資格確認書 with you, carry some cash, and start at a local clinic (診療所) rather than a large hospital, where an unreferred first visit costs several thousand yen extra.