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How Health Insurance Works in Japan

How Health Insurance Works in Japan (2025 Guide for Foreign Residents)

Japan’s healthcare system is widely respected for its accessibility and quality — and participation is mandatory for everyone who resides in the country. Whether you’re employed, self-employed, or studying, you must be enrolled in either Employee Health Insurance (Shakai Hoken) or National Health Insurance (Kokumin Kenko Hoken). This guide explains how Japan’s health insurance works, how to register, and what to expect in terms of costs and coverage.

1) Types of Health Insurance in Japan

Japan operates a universal health insurance system, meaning all residents must join one of the following:

  • Employee Health Insurance (社会保険 / Shakai Hoken): For full-time employees. Enrollment is handled by your employer, and premiums are automatically deducted from your monthly salary. Employers cover roughly half of the total contribution.
  • National Health Insurance (国民健康保険 / Kokumin Kenko Hoken): For freelancers, part-timers, students, and the unemployed. Enrollment takes place at your local city or ward office after registering your address.
  • Private or supplemental insurance: Optional plans that cover hospital stays, critical illness, or overseas medical expenses — not required but useful for added protection.

Official overview from Japan’s Ministry of Health, Labour and Welfare (MHLW): https://www.mhlw.go.jp/english/

2) How Premiums Are Calculated

Health insurance premiums in Japan are income-based. The higher your annual income, the more you pay — but everyone benefits from the same level of care.

  • Employee Insurance: Premiums are split 50/50 between you and your employer and automatically deducted from your salary.
  • National Insurance: Managed by your city office. You’ll receive a payment slip or invoice every few months. The amount is calculated based on your previous year’s income, household size, and location.

For an official breakdown of how National Health Insurance premiums are determined, see the MHLW’s National Health Insurance overview (PDF).

3) How Coverage Works

Japan’s system is designed to make healthcare affordable and predictable. Once enrolled, you’ll pay only a portion of medical costs at the point of service:

  • Most people pay 30% of the total cost of treatment.
  • Children under 6 and seniors over 75 often pay 10–20%.
  • Insurance covers doctor visits, hospital stays, surgery, prescriptions, maternity care, and dental checkups.

Example: A ¥10,000 doctor visit would typically cost you ¥3,000 out of pocket. The remaining ¥7,000 is covered by insurance and reimbursed directly to the clinic or hospital.

4) How to Enroll

Company Employees

Your employer will handle the entire process through Shakai Hoken. You’ll receive your health insurance card by mail or from HR within a few weeks. Premiums begin to be deducted from your first or second paycheck.

Freelancers, Students, or Unemployed Residents

Visit your local city or ward office within 14 days of moving in or changing your address. Bring:

  • Residence card
  • My Number card or notification slip
  • Passport
  • Proof of address (utility bill or juminhyo)

Staff will guide you through the process, often even in basic English. Japanese ward offices are generally flexible — if you’re late registering, explain your situation. Most are understanding and will help you resolve it smoothly.

5) Changing or Cancelling Insurance

If you switch jobs, leave Japan, or transition from employee to freelancer, you must update or cancel your insurance accordingly. Otherwise, you may continue to be billed. Notify both your company (if applicable) and your local city office.

When leaving Japan permanently, return your insurance card before departure to avoid future invoices.

6) Tips for Newcomers

  • Always bring your insurance card (kenko hokensho) when visiting a clinic or pharmacy.
  • If you forget it, you may need to pay the full cost upfront and request reimbursement later.
  • Check local city office websites — many now provide English pages for foreign residents.
  • If your monthly income changes significantly, report it to your ward; your premium can be adjusted.

Related Reading

To understand how healthcare fits into your monthly budget, read our full breakdown of the Cost of Living in Japan (2025 Guide).

Disclaimer: This article is for general informational purposes only and does not constitute legal or financial advice. Always verify details directly with your city or ward office or through official sources like the Ministry of Health, Labour and Welfare.

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