Understanding health insurance in Japan is one of the most important things you can do as a foreign resident. Japan has a universal healthcare system that keeps medical costs remarkably low — but only if you are properly enrolled. This comprehensive guide explains how the system works, what it covers, and what you need to do to make sure you are protected.
Japan’s Universal Healthcare: The Basics
Japan operates on a principle of universal health coverage. Every resident — including foreign nationals living in Japan for more than three months — is required by law to be enrolled in a health insurance program. There is no opt-out. This system ensures that everyone has access to affordable medical care, with patients typically paying only 30% of the total cost out of pocket.
There are two main types of health insurance in Japan:
1. National Health Insurance (国民健康保険 / Kokumin Kenkō Hoken — NHI)
NHI is for residents who are not covered by employer-based insurance. This includes self-employed individuals, freelancers, students, and unemployed residents. You enroll at your local city or ward office (区役所 / 市役所) when you register your address.
- Premiums: Based on your previous year’s income and the municipality where you live. Expect roughly ¥15,000 to ¥50,000 per month, though it can be higher for high earners.
- Coverage: 70% of medical costs are covered. You pay 30%.
- Enrollment: You must enroll within 14 days of registering your address. Late enrollment means you may owe back-premiums from the date you became eligible.
2. Employee Health Insurance (社会保険 / Shakai Hoken — EHI)
If you work for a company with five or more employees, you are automatically enrolled in Employee Health Insurance. Your employer handles the enrollment and splits the premium with you — each paying roughly 50%.
- Premiums: Based on your salary, typically around 10% of your monthly pay (split 50/50 with your employer).
- Coverage: Same 70% coverage as NHI, but often includes additional benefits such as sickness allowance (傷病手当金) if you cannot work due to illness.
- Dependents: Your spouse and children can be covered under your plan at no additional cost, as long as their annual income is below ¥1.3 million.
What Does Japanese Health Insurance Cover?
Japanese health insurance is comprehensive. It covers:
- Doctor consultations and examinations
- Prescription medications
- Surgery and hospitalization
- Mental health treatment, including psychosomatic medicine and psychiatry
- Diagnostic tests (blood work, imaging, etc.)
- Maternity care (with some limitations)
- Dental care (basic treatments)
However, some services are not covered:
- Cosmetic procedures
- Advanced treatments not yet approved in Japan
- Private hospital rooms (差額ベッド代)
- Most vaccinations for adults (such as flu shots)
- Annual health checkups (though employers are required to provide them)
The High-Cost Medical Expense Benefit (高額療養費制度)
One of the best features of Japanese health insurance is the High-Cost Medical Expense System. If your out-of-pocket medical expenses exceed a certain threshold in a single month, the government reimburses the excess. For most working-age adults with average income, the monthly cap is approximately ¥80,000 to ¥90,000. This means that even major surgery or extended hospitalization will not bankrupt you.
You can apply for a Limit-Application Certificate (限度額適用認定証) in advance, which means you only pay up to the cap at the point of care, rather than paying full price and waiting for reimbursement.
What If You Are a Tourist or Short-Term Visitor?
Tourists and visitors on stays of less than three months are not eligible for Japanese health insurance. If you fall ill or get injured during your trip, you will need to pay the full cost of treatment upfront. This is why travel insurance is absolutely essential.
Many clinics in Tokyo, including Tokyo Hub Clinic, can provide documentation to help you file a claim with your travel insurance provider. For a detailed comparison, see our article on travel insurance vs. national health insurance in Japan.
Common Questions from Expats
Can I use my home country’s insurance in Japan?
Generally, no. Most foreign health insurance plans do not have direct agreements with Japanese medical providers. You will need to pay out of pocket and then submit receipts to your insurer for reimbursement. Some international health insurance plans (such as Cigna Global or Allianz Care) may have partnerships with specific clinics in Tokyo.
What happens if I do not enroll in NHI?
If you fail to enroll, you will be responsible for 100% of your medical costs. Additionally, when you do eventually enroll (which you are legally required to do), you may be asked to pay back-premiums dating to when you first became eligible — up to two years’ worth.
Does insurance cover mental health treatment?
Yes. Both NHI and EHI cover mental health treatment, including visits to psychiatrists and psychosomatic medicine doctors. This includes consultations, diagnostic assessments, and prescription medications for conditions such as depression, anxiety, insomnia, and ADHD. Counseling (talk therapy) provided by a non-physician counselor is typically not covered. For more information, see our guide on mental health support in Tokyo.
I just arrived in Japan. How do I enroll?
Visit your local ward or city office within 14 days of registering your address. Bring your residence card (在留カード) and passport. The staff will help you complete the enrollment process. Your insurance card will typically arrive by mail within one to two weeks. In the meantime, you can ask the ward office for a temporary certificate.
Reducing Your Premium
If you are on a low income — for example, if you just arrived in Japan and had no Japanese income the previous year — you may qualify for a reduced NHI premium. Contact your ward office to ask about income-based reductions (軽減) or exemptions (減免). Students may also be eligible for reduced rates.
Need Help Navigating Insurance at Your Visit?
At Tokyo Hub Clinic, our English-speaking staff can help you understand how your insurance applies to your visit. Whether you have NHI, employee insurance, or travel insurance, we will guide you through the billing process. Dr. Ichiro Kamoshita, M.D., Ph.D., provides care in internal medicine and psychosomatic medicine at Hotel New Otani Garden Court, 2F — conveniently located near Akasaka-Mitsuke and Nagatacho stations.
By appointment only. Initial consultation: approximately ¥10,000–¥15,000.
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