Japan has excellent, universal healthcare — and unusually for Asia, joining it is compulsory. Residents registered for three months or more must enrol in the public health insurance system, either through their employer or their local city office.
Public cover reimburses around 70% of costs, leaving a co-payment that many Britons choose to top up with private or international insurance, along with English-speaking care and private rooms. This guide explains both layers for UK citizens in Japan.
Healthcare in Japan: how the system works
Public system: Public health insurance (Shakai Hoken / Kokumin Kenko Hoken).
Japan runs universal public health insurance in two main strands: employees join their company's Shakai Hoken (Employees' Health Insurance), while the self-employed, students and others enrol in Kokumin Kenko Hoken (National Health Insurance) at their local city office. Patients typically pay a 30% co-payment at the point of care, with a high-cost medical expense system that caps very large bills.
As a UK resident of Japan you are required to join the public system after three months, which gives you access to a wide network of hospitals and clinics with a 30% co-payment. Many expats add private cover for private rooms, English-speaking service and worldwide protection. There is no S1 or GHIC route in Japan, and a UK domestic policy will not cover you as a resident.
Is health insurance mandatory in Japan?
Enrolment in Japan's public health insurance is compulsory for anyone registered as a resident for three months or more — either through your employer's Shakai Hoken or through National Health Insurance (Kokumin Kenko Hoken) at your local municipal office. This is a legal requirement, not an optional extra, and premiums are broadly income-based. Private international insurance is taken on top of this public cover, not instead of it, so budget for both.
Why British expats take out private cover
Public insurance covers about 70% of costs, but you still pay the 30% co-payment, and public care can involve language barriers and shared wards. Private and international cover adds English-speaking private hospitals, private rooms, and worldwide protection for when you travel or return to the UK.
What expat health insurance costs in Japan
Public premiums are income-based and deducted or billed locally, while a private top-up policy is a moderate additional cost. Overall, the combination is reasonable by international standards, and comprehensive international cover rises with age and the area of cover you select.
Good to know before you move
- Public health insurance is compulsory for residents registered for three months or more.
- You typically pay a 30% co-payment, with a high-cost cap that limits very large bills.
- Employees join Shakai Hoken; the self-employed and others join Kokumin Kenko Hoken.
- Many expats add private cover for English-speaking care and private rooms.
Private hospitals and where Britons settle
Japan's British community is concentrated in Tokyo, with smaller clusters in Osaka and other cities, spread across business, teaching and academia.
Well-regarded international-friendly hospitals include St. Luke's International Hospital, Sanno Hospital and Tokyo Midtown Medical Center.
Popular with British expats: Tokyo, Osaka, Yokohama, Nagoya, Fukuoka.
How a UK broker helps expats in Japan
International private medical insurance is a specialist market, and the right policy depends on your visa, your age, your medical history and how much time you spend outside Japan. A UK-based specialist broker can compare the international insurers available through its service, check that a policy meets any local or visa requirement, and explain what is — and is not — covered before you commit.
A broker can compare only the insurers and policies available through its service, and may receive commission or charge a fee. Ask for the insurer panel, the remuneration disclosure and the total price. Requesting a quote is free and puts you under no obligation to buy.
Expat health insurance in Japan: FAQs
Is health insurance mandatory in Japan?
Yes. Anyone registered as a resident for three months or more must enrol in the public health insurance system — either Shakai Hoken through an employer or National Health Insurance at their local city office. It is a legal requirement rather than a choice.
What is the difference between Shakai Hoken and Kokumin Kenko Hoken?
Shakai Hoken is Employees' Health Insurance, provided through your company with premiums shared between you and your employer. Kokumin Kenko Hoken is National Health Insurance for the self-employed, students and others, arranged through your local municipal office. Both cover roughly 70% of costs.
Does my UK health insurance work in Japan?
A UK domestic policy is built for UK residents and will not cover you once you live in Japan, and there is no GHIC or S1 route here. Expats use Japan's public insurance plus, if they wish, an international policy that covers Japan.
Why do expats add private insurance in Japan?
Public cover leaves a 30% co-payment, and public hospitals can mean language barriers and shared rooms. Private or international cover adds English-speaking private care, private rooms and worldwide protection, which many Britons value.
How much do you pay at the doctor in Japan?
With public insurance you generally pay a 30% co-payment at the point of care, with the state covering the rest. A high-cost medical expense system caps what you pay if a bill is very large. Private cover can reduce or remove out-of-pocket costs at participating hospitals.
Other expat destinations
Visa, residency and insurance rules change and vary by individual circumstances. This guide is general information, not personal or regulated advice — always confirm the current requirements for your situation before you rely on them. Health Insurance UK is an information and lead-generation service, not an insurer or broker.