Japan's Healthcare System Explained: How to Use Health Insurance as a Foreign Resident

Japan's healthcare system is internationally renowned for its quality, accessibility, and affordability.
As a foreign resident, you are legally required to enroll in public health insurance, and doing so gives you access to excellent medical care at a fraction of the cost compared to uninsured care.
This guide will help you understand the system, how to enroll, and how to navigate hospitals and clinics in Japan.

Japan's Public Health Insurance System

Japan operates a universal health insurance system called 国民健康保険 (Kokumin Kenko Hoken, National Health Insurance) for those not covered by employer insurance, and 健康保険 (Kenko Hoken) for company employees.

National Health Insurance (国民健康保険 / NHI)

This plan covers self-employed individuals, students, part-time workers, and those between jobs.
You enroll at your local city or ward office.
Premiums are calculated based on your previous year's income and vary by municipality.
It covers 70% of medical costs — you pay the remaining 30%.

Employee Health Insurance (健康保険)

If you are employed full-time at a Japanese company, your employer automatically enrolls you in Employee Health Insurance.
Premiums are shared equally between you and your employer.
Coverage is generally the same as NHI — you pay 30% of medical costs.

How to Enroll

For NHI: Visit your local city or ward office with your residence card (在留カード) and My Number card (if available).
You must enroll within 14 days of registering your address in Japan.
For company employees: Your employer handles enrollment. Confirm with your HR department.

What Health Insurance Covers

Japan's health insurance covers a wide range of medical services:
Doctor consultations and examinations.
Hospitalization and surgery.
Prescription medications covered by Japan's national formulary.
Dental treatment (basic procedures only — cosmetic dentistry is not covered).
Maternity care and childbirth (partial coverage).
Mental health services.

Note: Some services are NOT covered, including most cosmetic procedures, elective treatments, and some alternative medicine.

Understanding Medical Costs

With health insurance, you typically pay 30% of the cost of treatment (your self-pay ratio, or 自己負担割合).
For example, a standard doctor's visit might cost ¥3,000–¥5,000 total, so you pay ¥900–¥1,500 out of pocket.
Children under 18 and elderly over 70 have reduced co-pay rates.

High-Cost Medical Care (高額療養費 / Kōgaku Ryōyōhi)

Japan has an excellent system that caps the amount you pay per month for medical expenses.
If your medical costs exceed a certain threshold (based on your income), the government reimburses the excess.
For most middle-income earners, the monthly cap is approximately ¥80,000–¥90,000.
This system protects you from catastrophic medical bills even in cases of serious illness.

How to Use a Hospital or Clinic in Japan

Step 1: Find a Medical Facility
For minor ailments, visit a local clinic (クリニック or 診療所).
For serious conditions or emergencies, go to a hospital (病院).
Many areas have lists of foreigner-friendly clinics with English-speaking staff.

Step 2: Bring Your Insurance Card
Always carry your health insurance card (保険証, Hokensho) to medical appointments.
Present it at the reception desk when you arrive.

Step 3: Register and Wait
Complete a registration form at the front desk (forms are usually in Japanese — you may need assistance).
Wait to be called by the doctor.

Step 4: See the Doctor
The doctor's consultation may be in Japanese — consider bringing a translation app or a Japanese-speaking friend.
Many major hospitals in cities have international consultation services.

Step 5: Pay at the Checkout
After your appointment, pay your 30% co-pay at the checkout counter.
You will receive a receipt (領収書) for your records.

Prescription Medications

After seeing a doctor, you will receive a prescription (処方箋, Shohosen).
Take this to a pharmacy (薬局, Yakkyoku) — many pharmacies are located near clinics.
Your insurance covers the cost of medications listed on the national formulary.
You pay 30% of the medication cost.

Dental and Eye Care

Basic dental treatments (fillings, extractions, cleanings) are covered by health insurance.
Orthodontic treatment and implants are typically NOT covered.
Eye exams are generally not covered, but glasses and contact lenses can sometimes receive partial coverage in specific medical cases.

Tips for Foreign Residents

Get an insurance card immediately: Enroll in health insurance as soon as you register your address and carry your card at all times.
Find an English-friendly clinic: Many cities maintain lists of hospitals with English-speaking staff. Ask your ward office or search online.
Download a medical translation app: Apps like "Medical Translator" or "VoiceTra" can help during consultations.
Know the emergency number: In Japan, the emergency number is 119 for ambulance and fire, and 110 for police.
Annual health check-ups (健診, Kensin): Many employers provide annual health screenings. These are highly recommended and often free or heavily subsidized.

Japan's healthcare system offers exceptional value and coverage for foreign residents.
By enrolling promptly and understanding how to navigate the system, you can access world-class medical care throughout your stay in Japan.