🏥 Complete Guide to National Health Insurance (NHI) in Japan
Everything foreign residents need to know about enrolling in Japan's National Health Insurance system, including eligibility, costs, and how to apply at your local city hall.
快速解答
Foreign residents in Japan who stay for more than 3 months and do not have employer-provided health insurance are generally expected to enroll in National Health Insurance (NHI) at their local city hall. NHI covers about 70% of medical costs for most treatments.
What is National Health Insurance (NHI)?
快速解答
National Health Insurance (Kokumin Kenko Hoken) is Japan's public health coverage for residents not covered by employer insurance. It typically covers 70% of eligible medical expenses, with the enrollee paying 30% at the point of care.
Japan has a universal healthcare system, and almost all residents are expected to be enrolled in some form of health insurance. National Health Insurance (NHI), known as Kokumin Kenko Hoken (国民健康保険), is the public health insurance plan managed by local municipalities.
| Item | Details |
|---|---|
| 📋 Coverage | 70% of eligible medical expenses paid by insurance |
| 💰 Your Share | 30% out-of-pocket at point of care |
| 👶 Children Under 6 | 20% out-of-pocket (varies by municipality) |
| 👴 Age 70-74 | 20% out-of-pocket (income-dependent) |
NHI is designed for residents who are not covered by employer-sponsored health insurance (Shakai Hoken). This includes self-employed individuals, students, part-time workers not eligible for employer coverage, and unemployed residents.
What NHI Covers
Consultations, surgery, inpatient care
Medications prescribed by your doctor
Basic dental treatments covered
Consultations and therapy sessions
⚠️ Not Covered by NHI
Cosmetic surgery, certain advanced treatments not on the national formulary, and medical services received outside Japan are not covered.
NHI vs. Employer Insurance (Shakai Hoken)
🏥 National Health Insurance (NHI)
- • For self-employed, students, unemployed
- • Premiums based on previous year income
- • Managed by your municipality
- • You pay 100% of the premium
🏢 Employer Insurance (Shakai Hoken)
- • For company employees
- • Premiums shared 50/50 with employer
- • Managed by your employer\'s insurer
- • Includes dependent coverage
If you work for a company that enrolls you in Shakai Hoken, you do not need to join NHI. When you leave your employer, you typically need to switch to NHI within 14 days.
Who Can Enroll in NHI?
快速解答
Foreign nationals residing in Japan with a valid residence card and a period of stay exceeding 3 months are generally eligible for NHI enrollment, unless they are already covered by employer-sponsored health insurance.
Eligibility for NHI is based on your resident status in Japan:
✅ Eligible Residents
- • Foreign nationals with a residence card and registered address
- • Period of stay exceeding 3 months
- • Self-employed individuals and freelancers
- • Students at Japanese educational institutions
- • Unemployed residents or those between jobs
- • Part-time workers without employer coverage
- • Dependents not on a family member\'s employer plan
❌ Not Eligible
- • Short-term visitors (tourist visa, under 3 months)
- • Already enrolled in employer-sponsored insurance
- • Receiving public assistance (seikatsu hogo)
💡 Tip
If you are unsure of your eligibility, visit the National Health Insurance counter at your local city hall or ward office. Staff can verify your status and guide you through the process.
免费保险咨询
免费保险咨询 →How to Enroll in NHI
快速解答
To enroll in NHI, visit the National Health Insurance counter at your local city hall within 14 days of moving in. Bring your residence card, passport, and My Number notification. The process is typically completed in one visit.
| Item | Details |
|---|---|
| 📍 Where | NHI counter at your local city hall or ward office |
| ⏰ Deadline | Within 14 days of becoming eligible |
| 💰 Cost | Free to enroll (premiums billed separately) |
| ⏱ Time | About 30 minutes at the office |
Step-by-Step Enrollment Process
Submit a moving-in notification (tennyuu todoke) at your city hall first
Look for signs saying 国民健康保険 at your city or ward office
Staff will provide the form. Many offices offer multilingual support
Present all documents listed below
Temporary certificate same day; official card by mail in 1-2 weeks
Required Documents
在留カード
パスポート
マイナンバーカード or notification letter
印鑑 — some offices accept signatures
⚠️ Important: 14-Day Deadline
You are expected to enroll within 14 days of becoming eligible. Late enrollment does not waive premiums — you may be charged retroactively from the date you became eligible.
NHI Premiums and Costs
快速解答
NHI premiums are calculated based on your previous year's income and the number of household members enrolled. Annual premiums for a single person typically range from about 20,000 to 800,000 yen depending on income and municipality.
How Premiums Are Calculated
NHI premiums vary by municipality and are based on several factors:
| Component | Basis | Description |
|---|---|---|
| Income-based | Previous year\'s taxable income | Largest portion for most residents |
| Per-capita | Flat amount per person | Charged for each enrolled household member |
| Asset-based | Fixed assets owned | Applied in some municipalities only |
| Household | Flat amount per household | One charge per household regardless of size |
Payment Methods
Premiums are typically billed in 8-10 installments per year:
Premium Reduction for Low-Income Residents
70%
Reduction
Lowest income tier
50%
Reduction
Low income tier
20%
Reduction
Moderate-low income tier
💡 Tip
File a tax return even if your income is zero. The municipality uses your filed income to determine eligibility for premium reductions.
⚠️ What Happens If You Don\'t Pay
Unpaid premiums can result in a short-term insurance certificate or a requirement to pay 100% of medical costs upfront. Consistent non-payment may lead to asset seizure. Contact your city hall if you are having difficulty paying — payment plans and reductions are available.
检查所需手续
检查所需手续 →Using Your NHI Card
快速解答
Present your NHI insurance card at any hospital or clinic in Japan to receive treatment at the standard 30% co-pay rate. Without the card, you may need to pay 100% upfront and apply for reimbursement later.
At the Hospital or Clinic
Show your card at the reception desk when you arrive
See the doctor, get tests or treatment as needed
NHI covers the remaining 70% automatically
High-Cost Medical Expense Benefit (高額療養費)
🛡️ Monthly Cost Cap
If your medical expenses in a single month exceed a certain threshold (based on income), the Kogaku Ryoyohi system caps your out-of-pocket expenses. A person with standard income may have a monthly cap of approximately 80,000 yen. Apply for a Limit Certificate (Gendo-gaku Tekiyo Ninteisho) in advance at city hall to avoid paying the full amount upfront.
When You Lose or Damage Your Card
If your NHI card is lost, stolen, or damaged, visit your city hall to apply for a reissue. Bring your residence card and identification. A replacement card is usually issued within 1-2 weeks.
Moving to Another Municipality
Return your NHI card and notify the insurance counter
Premiums will be recalculated based on your new municipality\'s rates
Special Situations
快速解答
Students, new arrivals, and residents changing jobs have specific NHI considerations. Students may qualify for reduced premiums, and new arrivals who had no income in Japan the previous year often receive lower initial premiums.
🎓 For Students
International students are eligible for NHI. With little or no income, most qualify for the maximum 70% premium reduction. File a simplified tax return at your local tax office, even if your income is zero, to receive this benefit.
✈️ For New Arrivals
If you had no income in Japan during the previous fiscal year, your initial premiums will be based on per-capita and household portions only (no income-based component). Premiums may increase the following year once your Japan-based income is reported.
Leaving Japan
Bring your NHI card and residence card
Receive a final premium calculation and pay any balance
Designate a bank account or representative in Japan to receive any refund
Pregnancy and Childbirth
👶 Childbirth Lump-Sum Allowance
NHI provides a lump-sum birth allowance (shussan ikuji ichijikin) of 500,000 yen per child. This is paid directly to the hospital in most cases. Regular prenatal checkups are partially subsidized through separate municipal vouchers, not through NHI directly.
办理步骤
- 1
Complete resident registration
Submit your moving-in notification at city hall to register your address.
- 2
Visit the NHI counter
Go to the National Health Insurance window at your city or ward office.
- 3
Fill out the application
Complete the NHI enrollment form provided by staff.
- 4
Submit documents
Present your residence card, passport, and My Number card or notification.
- 5
Receive your insurance card
Get a temporary certificate the same day; the official card arrives by mail in 1-2 weeks.
常见问题
Can I use NHI at any hospital in Japan?
What happens if I go to the hospital without my NHI card?
Can my family members be covered under my NHI?
Do I need NHI if I have travel insurance?
How do I switch from employer insurance to NHI?
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