Children's Health Insurance and Medical Subsidies in Japan: The Complete Guide for Foreign Families

One of the most reassuring aspects of raising children in Japan is the country's generous healthcare system for kids. Whether you're a newly arrived expat or a long-term resident, understanding how children's health insurance works — and how to access the free or heavily subsidized medical care available — can save your family thousands of yen every year. This guide breaks down everything foreign parents need to know about enrolling children in Japanese health insurance, accessing the child medical subsidy (子ども医療費助成, Kodomo no Iryōhi Josei), and making the most of related benefits.

How Health Insurance Works for Children in Japan

In Japan, health insurance is mandatory for all residents — including foreign residents and their children. Children are not issued separate insurance policies; instead, they are added as dependents to a parent's health insurance plan.

There are two main types of insurance your child can be enrolled in:

1. National Health Insurance (国民健康保険 / NHI) — For self-employed individuals, freelancers, students, or anyone not covered by employer insurance. Enrollment and premium payments are handled at your local city or ward office (shiyakusho or kuyakusho).

1. Social/Employee Health Insurance (社会保険 / Shakai Hoken) — For company employees. Your child is added as a dependent through your employer's HR department. This typically offers slightly better coverage at lower out-of-pocket cost than NHI.

Under standard insurance, cost-sharing rates for children are:

• Children under 6: 20% copayment (insurance covers 80%)
• Children aged 6–69: 30% copayment (insurance covers 70%)

These rates are set by national law, but in practice most families pay far less than these amounts thanks to municipal subsidy programs described below.

For a comprehensive look at the broader healthcare system for children in Japan, see our guide on Healthcare and Medical Care for Children in Japan.

The Child Medical Subsidy Program (子ども医療費助成)

The most impactful benefit for families with children in Japan is the Child Medical Expense Subsidy (Kodomo no Iryōhi Josei). This local government program — operated independently by all 47 prefectures and every municipality — covers the copayment share that national insurance does not pay, effectively making most medical care free or near-free for children.

What the subsidy covers

• Outpatient visits (doctor's visits, specialist consultations)
• Inpatient care (hospital stays)
• Prescription medications
• Dental treatment (in most municipalities)

What it does NOT cover

• Routine vaccinations (though municipalities provide separate coupon books)
• Baby wellness checkups beyond the nationally subsidized schedule
• Private room upgrades in hospitals
• Orthodontic treatment (for most cosmetic cases)
• Corrective lenses for children over age 9 in some municipalities

Age eligibility

The subsidy's upper age limit varies by municipality:

A 2017 study published in Frontiers in Pharmacology analyzing 219 municipalities across five Kanto prefectures found that age eligibility upper limits cluster at three thresholds nationally: age 12, age 15, and age 16+, reflecting differing local policy priorities.

Are Foreign Residents Eligible?

Yes — completely. Foreign residents are fully eligible for children's health insurance and the medical subsidy program, provided the following conditions are met:

1. The child is registered on the *jūminhyō* (住民票) — Japan's resident registry. This must be done at the local ward/city office.
2. The child is enrolled in Japanese health insurance — either through NHI or the parent's social insurance.
3. The parent is also registered and insured — as the account holder of the insurance plan.

The child's nationality is irrelevant — Japanese citizenship is not required. Children on dependent visas, spouse visas, or even those born in Japan to foreign parents are fully covered. There is no minimum residency duration required in most municipalities.

For more on the legal framework for foreign families in Japan, see our guide on Visa and Legal Issues for Foreign Families with Children in Japan.

For more practical guidance on navigating Japan as a working foreign resident, For Work in Japan offers helpful resources covering employment and daily life.

How to Apply: Step-by-Step

Applying for the child medical subsidy is separate from enrolling in health insurance and must be done manually — it is not automatic. Here's the process:

Step 1: Enroll your child in health insurance

• NHI: Visit your local city/ward office with your child's residence registration (jūminhyō), your own NHI card, and your child's birth certificate (or passport). Your child will receive their own NHI card.
• Social Insurance: Contact your employer's HR department. They will process the dependent enrollment paperwork.

Step 2: Apply for the Child Medical Subsidy Certificate

Bring the following documents to your local city/ward office:

You will receive a Child Medical Expense Subsidy Certificate (Iryōhi Josei Jukyū Shōmei-sho). Present this card at any clinic or hospital along with the health insurance card to receive reduced or free care.

Step 3: Use the certificate at medical facilities

At the reception desk, present both your child's health insurance card and the subsidy certificate. The clinic will bill the remaining amount (after insurance) directly to the municipality. In most cases, you pay ¥0 or a small administrative fee.

Apply within 14–15 days of moving to a new municipality or after birth to maximize coverage from the start. Benefits do not transfer if you move — you must re-apply in your new municipality.

Copayment Caps and Regional Variations

While many municipalities offer fully free care, others apply small copayment caps. Here are some examples:

About 40% of municipalities nationally maintain some form of partial copayment even under the subsidy scheme, while 60% have eliminated copayments entirely. Around 21% of municipalities still apply income-based eligibility criteria, though this number has been declining as the national government pushes for universal coverage.

Additional Child Benefits Worth Knowing About

Japan's support for families with children extends well beyond basic health insurance. Here are the key financial benefits foreign residents can also access:

Child Allowance (児童手当 / Jidō Teate)

The national Child Allowance program provides a monthly cash payment to families with children up to age 18:

Foreign residents are eligible if they have a qualifying resident status and are enrolled in the resident registry. Apply at your ward/city office.

Vaccination Coupons

Each municipality issues free coupon books for scheduled childhood vaccinations. Vaccines covered under the national schedule (including BCG, polio, MMR, varicella, HPV, and others) are fully free when using these coupons at designated clinics. Ask for the vaccination schedule booklet (yobōsesshu tebiki) at the ward office when registering your child.

Childbirth Lump Sum (出産育児一時金)

If your child was born in Japan or you're expecting, note that national health insurance provides a ¥500,000 lump sum birth benefit (Shussan Ikuji Ichiji-kin) to help offset hospital delivery costs. This is available to all insured residents regardless of nationality.

For more information on pregnancy and childbirth in Japan, see our guide on Pregnancy and Giving Birth in Japan as a Foreign Parent.

For comprehensive coverage of all government benefits available to foreign families, also read our article on Government Benefits and Subsidies for Families in Japan.

Tokyo-Specific Benefits in 2025

Tokyo stands out as one of Japan's most generous cities for family benefits. As of 2025, Tokyo families benefit from:

• Free medical care through age 18 — No copayments for outpatient or inpatient care at any certified facility
• Free licensed daycare for ages 0–5 — All licensed (nintei) daycare facilities are free for Tokyo residents
• Extended free daycare for ages 0–2 — From September 2025, free daycare for infants and toddlers applies to all income levels, removing the previous means-testing
• Tokyo 0-18 Support Payment (018サポート) — ¥5,000/child/month for every child under 18, regardless of income
• Child Allowance (national) — ¥10,000–¥30,000/child/month as described above

For a two-child family living in Tokyo, these combined benefits can represent annual savings of ¥950,000 to ¥2,600,000 — a significant portion of the cost of raising children.

For families considering daycare options in Japan more broadly, our guide on Daycare and Hoikuen in Japan for Foreign Parents covers enrollment, fees, and what to expect.

Practical Tips for Foreign Parents

Language barrier at clinics: Many pediatric clinics in major cities have English-speaking staff or translation apps available. The Japan Healthcare Info website at Japan Healthcare Info maintains a directory of English-friendly clinics.

Keep your subsidy certificate up to date: The certificate is typically renewed annually or when your child's insurance changes. Set a calendar reminder — an expired card means paying the full copayment out of pocket and requesting reimbursement later.

Moving between municipalities: If you relocate, immediately visit the new ward office to register your child and re-apply for the subsidy certificate. The new municipality will issue a new card, but you must initiate the process.

Using emergency rooms: Even at emergency facilities, present both your insurance card and subsidy certificate. Some ERs charge a surcharge for non-urgent after-hours visits that is NOT covered by the subsidy — for non-emergencies, use the daytime clinic.

Prescription drugs: When filling prescriptions at a pharmacy, present both cards. Drug costs are usually fully covered under the subsidy. Some specialty medications may require additional paperwork from your doctor.

For broader expat community advice and resources for daily life in Japan, Living in Nihon is a helpful English-language resource covering many aspects of residing in Japan with a family. For study support and educational resources relevant to children in Japan's school system, Chuukou Benkyou provides guides on the junior high and high school curriculum. For comprehensive statistics and research data on Japan's pediatric healthcare system, the Frontiers in Pharmacology regional subsidy study is a valuable academic reference. You can also find practical guides for expat families on benefits and childcare from GaijinPot's government subsidies guide. For additional perspectives on the expat life and education options for multilingual families, see our article on Raising Bilingual Children in Japan.

Summary Checklist for New Foreign Families

• [ ] Register child at local ward/city office (jūminhyō enrollment)
• [ ] Enroll child in NHI or add as dependent on Social Insurance
• [ ] Apply for Child Medical Subsidy Certificate at ward/city office
• [ ] Apply for Child Allowance (Jidō Teate) at ward/city office
• [ ] Obtain vaccination coupon booklet from ward/city office
• [ ] Confirm subsidy age limit and copayment rules for your specific municipality
• [ ] Re-apply in new municipality if you move
• [ ] Renew subsidy certificate annually

Japan's children's health insurance and medical subsidy systems are among the most comprehensive in the world, and foreign families are fully entitled to use them. The application process takes just one or two visits to your local municipal office — and the financial and peace-of-mind benefits are substantial. If you're newly arrived or expecting a child, make these applications a top priority in your first weeks in Japan.

For more guidance on raising children in Japan as a foreign family, explore our full resource hub at The Complete Guide to the Japanese Education System for Foreign Families.