Baby Medical Coverage in Japan: Free or Subsidized Healthcare for Your Newborn (2026)

May 31, 2026 Maternity Prep Navigator Editorial ~18 min read

One of the things that surprises many international families in Japan is that a newborn's medical visits can end up costing very little — or sometimes nothing at all at the point of care. This is not an accident. Japan has a layered system: first, children are enrolled in Japan's public health insurance, which reduces the co-payment for children under school age to 20%. Then, on top of that, every municipality in Japan runs a child medical subsidy program that further reduces — and in many cases eliminates — that remaining out-of-pocket cost. This article explains both layers, how to enroll your newborn, what to do if your medical card is not ready yet, and what foreign parents specifically need to know.

1. How the Two-Layer System Works

Understanding how your baby's medical costs are covered in Japan requires understanding two separate programs that work together.

The first layer is Japan's national public health insurance system. Every resident — including children from birth — must be enrolled in a public health insurance plan: either the social insurance plan (shakai hoken) through an employer, or National Health Insurance (kokumin kenko hoken, NHI) through the municipality. Once enrolled, children under school age (before starting elementary school — generally children who have not yet reached April 1 of the school year in which they turn 6) pay a 20% co-payment for covered medical services. This is lower than the 30% rate that applies to working-age adults. This 20% rate applies everywhere in Japan — it is a national rule, not a municipal one.

The second layer is a locally operated subsidy program run by each municipality (nyuyoji iryo hi josei seido, often called kodomo iryo hi josei or, in Tokyo, "maru-nyu"). This program covers most or all of that remaining 20% co-payment, so that parents often pay very little or nothing at the point of care. The municipality funds this subsidy from its own budget. Because it is a local program — not a national entitlement — the specific rules differ from place to place.

The two layers together mean that, for many families in Japan, a routine pediatric visit ends up costing very little. But the exact cost depends on your municipality's rules, whether income conditions apply, and the age of your child. Do not assume that because your neighbor's child had free care, your child will too — particularly if you live in a different municipality.

2. The 20% Co-Payment for Children Under School Age

Japan's public health insurance generally requires patients to pay a share of their covered medical expenses. For working-age adults (ages 6 to 69 in the national scheme), the standard rate is 30%. For children under school age — specifically, children who have not yet started elementary school (i.e., below the April 1 of the school year in which they turn 6) — the national rate is 20%. This lower rate is established in national law and applies to all children in this age group enrolled in Japan's public health insurance, regardless of which municipality they live in or which type of health insurance plan their parent is enrolled in.

Once a child starts elementary school, the co-payment rate generally rises to 30% under the national scheme — but in practice, the municipal subsidy typically continues to reduce the actual amount paid at the clinic for older children as well, depending on the municipality's program.

3. The Municipal Child Medical Subsidy: What It Is and Why It Varies

The nyuyoji iryo hi josei seido (乳幼児医療費助成制度, often also called kodomo iryo hi josei for older ages) is a program in which each municipality uses its own budget to subsidize children's medical costs beyond what national health insurance covers. As of the Children and Families Agency's (Kodomo Katei-cho) FY2024 (Reiwa 6) survey, every prefecture and every municipality in Japan was implementing some form of child medical fee assistance. Coverage has expanded significantly in recent years, with many municipalities now covering children through middle school or high school graduation.

However — and this is the critical point — the specific rules differ substantially between municipalities. The key areas of variation include:

• Maximum covered age: Some municipalities cover only preschool-age children (before elementary school entry). Others extend coverage through the end of middle school (age 15), and many now cover children through the end of high school (age 18 or until March 31 of the fiscal year the child turns 18). A small number of municipalities go beyond age 18. The age limit set in your municipality as of May 2026 may differ from what you have heard about elsewhere.
• Income conditions: Some municipalities provide the subsidy universally, with no income test. Others apply an income threshold — if your household income exceeds the threshold, you may pay a higher co-payment or not qualify for the full subsidy.
• Co-payment structure: Even where the subsidy applies, some municipalities charge a small fixed fee per visit (for example, a few hundred yen per outpatient visit or per day of hospitalization). Others have no co-payment at all for covered visits.
• Outpatient vs. inpatient: Some programs have different rules for outpatient (clinic) visits and inpatient (hospital) stays.
• Dental and pharmacy: Whether the subsidy applies to dental care and to prescribed medications may also vary.

Because of this variation, do not rely on information from another city or from a friend who lives in a different area. The rules that apply to you are determined by the municipality where your child is registered as a resident. Confirm the current rules at your city, ward, or town office — or on your municipality's official website — after your baby is born and enrolled.

4. How to Enroll Your Newborn: The Two-Step Process

To use Japan's child medical subsidy system, your baby needs to complete two separate enrollment steps. Both should be done as soon as possible after birth — ideally within the first two weeks.

Step 1: Enroll your newborn in public health insurance

Your baby must be enrolled in a health insurance plan before they can receive insurance-covered medical care. The type of insurance depends on your situation:

• If you (the parent) are enrolled in employee social insurance (shakai hoken / kenpo): Contact your employer's HR department or health insurance association to add your newborn as a dependent (hihokensha). Do this promptly after birth — the earlier the better, as there is typically a window within which retroactive enrollment from birth is straightforward.
• If you are on National Health Insurance (NHI / kokumin kenko hoken): Go to your city or ward office's NHI counter with the baby's birth notification receipt (shussei todoke no uketsuke shomeisho) or family register (koseki / juminhyo showing the baby), your own NHI card, and your residence card (zairyu card). Your newborn will be added to your household's NHI.

Once enrolled, your baby will receive a health insurance card (hoken-sho) or be added to a family-type card. Keep this card — you will need it every time your child sees a doctor.

For a more detailed guide to newborn health insurance enrollment, including timing, required documents, and special steps for international families, see our complete guide to health insurance enrollment for newborns.

Step 2: Apply for the municipal medical subsidy certificate (iryo-sho / jukyusha-sho)

Once your baby has a health insurance card (or at least an enrollment confirmation), go to your city or ward office and apply for the child medical subsidy certificate. This document — often called an iryo-sho (医療証) or jukyusha-sho (受給者証), though the name varies by municipality — is what allows the clinic to apply the subsidy and charge you only the reduced amount (or nothing) at the counter.

At the office, bring:

• Your baby's health insurance card (or enrollment confirmation document)
• Your own residence card (zairyu card) or identity document
• Your baby's My Number notification card or My Number card (if you have received it)
• Any income documentation your municipality requires (if income conditions apply)
• A bank account number for the subsidy-holder (in case reimbursements are needed)

Processing time varies. In some municipalities, the certificate is issued the same day. In others, it is mailed within a few days or a few weeks. Keep the certificate in a safe place, and bring it to every medical visit along with your baby's health insurance card.

If you are unsure whether your municipality requires additional steps — for example, if you have recently moved or if there are residence status considerations — call your city or ward office's family or child services counter (kodomo ka or similar) in advance.

5. Using the System at the Clinic or Hospital

Once you have both the health insurance card and the municipal medical certificate for your baby, using the system at a clinic or hospital is straightforward:

1. At the reception counter, present both cards: your baby's health insurance card (hoken-sho) and the municipal medical certificate (iryo-sho / jukyusha-sho).
2. The clinic's billing system will calculate the 20% co-payment and then apply the municipal subsidy to determine your final payment. Depending on your municipality's rules, this final amount may be zero, a small flat fee, or a reduced percentage.
3. Keep the receipt from each visit. If you are charged more than you expected (for example, if the clinic is outside your municipality and has not confirmed your subsidy status), you can apply for reimbursement at your city or ward office afterward.

If you are visiting a hospital or clinic outside your registered municipality, the subsidy may not be applied automatically at the counter. In that case, you may pay the 20% co-payment in full and apply for reimbursement from your home municipality afterward — typically by submitting the receipt and a reimbursement request form (ryoyo-hi shikyuu shinsei-sho) at your city or ward office. Confirm the process in advance if you are visiting a clinic outside your area regularly.

6. What to Do Before Your Medical Card Arrives

If your newborn needs medical care before you have completed the enrollment steps or before the municipal medical certificate has been issued, you may face one of the following situations:

• Health insurance card not yet issued: Without an insurance card, the clinic may charge you the full amount (10/10 — the full undiscounted fee). Ask the clinic whether they will accept a letter of enrollment confirmation from your insurer or a temporary certificate. Keep all receipts. Once the health insurance card is issued, contact your insurer to confirm whether a retroactive claim is possible for bills already paid at full price.
• Health insurance card issued but municipal certificate not yet received: In this case, the clinic can apply the 20% national co-payment. You pay 20%, and you can apply for reimbursement of the municipal subsidy portion from your city or ward office after the certificate is issued, using your receipts. Ask your city office about the reimbursement procedure (ryoyo-hi no kanpu shinsei).
• Both cards pending: Pay the full amount, keep all receipts, and apply for reimbursement once both enrollment steps are complete. Do not delay in applying — reimbursement deadlines vary by municipality (often within one year of the date of treatment, but confirm locally).

7. Points for Foreign Parents

General eligibility for foreign residents' children

Children of foreign residents in Japan are generally eligible for both the national health insurance enrollment and the municipal medical subsidy, provided that the following conditions are met:

• The child has a qualifying residence status (zairyu shikaku).
• The child is registered as a resident (jumin toroku) in Japan.
• The child is enrolled in Japan's public health insurance (either through a parent's employee insurance or NHI).

Residence status is particularly important for foreign parents to address promptly after birth. A baby born in Japan to foreign parents does not automatically acquire Japanese nationality. The baby will need to acquire a residence status within 60 days of birth (with an application for the status itself generally expected within 30 days from birth as a guideline). Until the baby has a residence status, registering them as a resident and enrolling them in health insurance may face procedural limitations. For a detailed guide to the residence status process for newborns, see our guide to dependent visa and residence status for your newborn.

Once the child's residence status is in place, the path to health insurance enrollment and municipal medical subsidy enrollment follows the same steps as for Japanese families. The child's nationality is generally not a condition for the municipal subsidy — what matters is registered residence in the municipality.

Practical steps in order

1. After birth: apply for the baby's residence status (if both parents are non-Japanese, or if the Japanese-national parent has not registered the birth with the local authority).
2. Once residence status is confirmed: register the baby as a resident (jumin toroku) at your city or ward office.
3. Enroll the baby in health insurance (employee insurance or NHI).
4. Apply for the municipal medical subsidy certificate.
5. Use both cards at the clinic.

Language support at the municipal office

In many cities and wards with significant international populations, municipal offices provide interpretation support (in person or by phone) for administrative procedures including child-related enrollments. Call ahead to ask what languages are available. International resident support centers (kokusai koryu sentaa) and volunteer interpreter networks can also help. Some municipal offices have multilingual guidance sheets for common procedures.

If you move to a different municipality

The municipal medical subsidy certificate is issued by the municipality where your child is registered as a resident. If you move, you will need to go through the application process again at your new municipality. The new municipality's rules may differ from your previous one. Do not assume that conditions are identical.

8. Pediatric Emergency: #8000 Childcare Phone Consultation

Japan operates a pediatric telephone consultation service for parents unsure whether their child's condition requires emergency care. The service is accessed by dialing #8000 from a mobile or landline phone within Japan. A nurse or healthcare professional provides advice on whether the child needs to go to an emergency room or can wait for a regular appointment. #8000 is for situations where you are unsure — if your child is in a clear emergency (for example, difficulty breathing, unresponsiveness, or a serious injury), do not wait: call 119 for an ambulance or go to the nearest emergency room immediately.

Important reservations: the availability hours, languages supported, and staffing of this service vary by prefecture. Not all prefectures operate the service 24 hours a day; some operate only in the evenings or on holidays. The primary language of the service is Japanese. Confirm the hours and availability in your prefecture before assuming the service is accessible to you at the time you need it. Your municipality or local international resident support center may have information about interpreter access for this service.

For a broader guide to emergency contacts in Japan — including how to call an ambulance and communicate during emergencies — see our guide to emergency contacts and calling an ambulance in Japan.

9. FAQ

Is my baby's medical care completely free in Japan?

Potentially, but it depends on where you live. Japan's national public health insurance reduces the co-payment for children under school age to 20%. On top of that, every municipality runs a subsidy program that typically covers most or all of that 20% co-payment. In practice, many families pay little or nothing at the clinic. However, the exact terms — including whether there is any co-payment at all, the age up to which the subsidy applies, and whether income conditions exist — vary by municipality. Check the rules in your area at your city or ward office.

My baby was born very recently and we do not have a health insurance card yet. What do we do if the baby gets sick?

If you have not yet enrolled your baby in health insurance, you may be charged the full undiscounted fee at the clinic (10/10). Keep all receipts. Contact your insurer or city office as soon as possible about retroactive enrollment and reimbursement of fees paid before the card was issued. Enroll as quickly as possible — do not wait. If your baby's condition is urgent, go to the clinic or emergency room regardless of insurance status, pay what is charged, and sort out the reimbursement afterward.

We have the health insurance card but not the municipal medical certificate yet. How much will we pay?

With only the health insurance card, the clinic will charge you the national co-payment rate: 20% for children under school age. The municipal subsidy portion (which would normally bring this down further) can be claimed as a reimbursement from your city or ward office after the certificate is issued. Keep your receipts from any visits during this period and ask your city office about the reimbursement process.

Are children of foreign residents eligible for the subsidy?

Generally yes, provided that the child has a valid residence status, is registered as a resident in Japan, and is enrolled in Japanese public health insurance. Nationality is generally not a condition. However, the specific requirements can vary — always confirm with your city or ward office for the definitive answer that applies to your situation.

My child is now school age. Is there still a subsidy?

Many municipalities extend the child medical subsidy beyond preschool age — through middle school or high school graduation in many areas. The national co-payment rate rises to 30% once a child starts elementary school, but the municipal subsidy often continues to offset much or all of that cost. Confirm your municipality's current age limit for the subsidy. The Children and Families Agency's FY2024 survey found that most municipalities now extend some form of coverage through at least age 15, and many through age 18 — but this varies. Check with your local office for the current rules.

I recently moved to a new municipality. Do I need to re-apply?

Yes. The medical subsidy certificate is issued by the municipality where your child is registered as a resident. After a move, you will need to notify your new municipality and re-apply for the subsidy certificate there. The new municipality may have different rules, age limits, and income conditions. Complete this step promptly after moving to avoid a gap in coverage.

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