The question is not whether your policy is good enough
China and Japan sit at the opposite end of the spectrum from Thailand. Neither of them asks whether your international policy is adequate, because neither of them will accept it in place of the statutory scheme. Both compel enrolment in a public system, and both treat private and international cover as supplementary — something you may hold in addition, never something you may hold instead.
That produces a specific and common failure of expectation. An expatriate arrives with a comprehensive international policy, correctly assumes it will pay for treatment, and incorrectly assumes it settles the question of compliance. It does not. The policy is a funding arrangement; the statutory scheme is a legal obligation, and the two are unrelated in the eyes of the authorities. You can hold the best policy on the market and still be in breach.
The pattern is worth generalising, because it recurs. International cover is very often accepted at the visa stage and very rarely accepted at the residence stage — the point at which you register an address and become a resident is usually the point at which local enrolment attaches. That is set out at length in visa stage versus residence stage health cover, and China and Japan are two of its clearest illustrations.
China: the Interim Measures and the five branches
The Interim Measures for the Participation in Social Insurance of Foreigners Employed in China took effect on 15 October 2011. Their effect is straightforward: foreigners legally employed in mainland China, together with their employers, must contribute to social insurance across all five branches — pension, medical, work injury, unemployment and maternity — on the same basis as Chinese employees.
There is no benefit test for the foreign employee to fail and no equivalence assessment to pass. The obligation attaches to the employment relationship, not to the adequacy of any alternative arrangement. The sourcing here is legal and advisory commentary on the Measures rather than a primary regulator page; the substance is consistently reported, but it is commentary, and it is labelled as such throughout this section.
Totalisation agreements exempt far less than people assume
This is the nuance that causes the most trouble in practice.
Nationals of countries that hold a social security totalisation agreement with China, and who remain covered by a mandatory scheme at home, are exempt from Chinese contributions — but only to the extent of that agreement. The exemptions are partial, negotiated branch by branch, and they are not interchangeable between countries.
| Nationality | Branches exempted under the agreement, as reported |
|---|---|
| Germany | Pension and unemployment only |
| South Korea | Pension only |
The pattern that matters is what is missing from both rows: medical insurance is generally not exempted. So the branch an expatriate most cares about, and most often assumes is dealt with by their international policy, is usually the one that remains compulsory. Someone who has been told "there is an agreement, so you are exempt" has generally been told something true about pension contributions and misleading about medical ones. The related question of certificates of coverage and posted-worker status is dealt with in posted workers, A1 certificates and social security.
If you are relying on an exemption, read the specific agreement between China and your country of nationality, and establish which branches it actually covers. Do not reason from another nationality's outcome.
Enforcement varies by city
Advisory commentary consistently reports that local enforcement of the social insurance obligation for foreigners varies materially between cities, with Shanghai historically described as the most permissive. That is a real and practically important observation, and it is also one to handle carefully: variation in enforcement is not variation in the law. The duty exists nationally; what differs is the vigour with which a particular local bureau pursues it, and local practice can change without any change in the underlying rule.
The planning consequence is that "nobody enforces it here" is a description of current administrative behaviour, not a defence. Establish the position with the local bureau covering the city where you will actually work, and with your employer, who carries the counterpart obligation.
The work permit health certificate
Separately from social insurance, the Foreigner's Work Permit and residence permit process involves a health requirement: a verification certificate of physical examination records for overseas personnel, or a health certificate issued by Chinese inspection-and-quarantine institutions, with a commitment system that allows retroactive submission after entry in some cases. The dates on the official pages describing this could not be confirmed during research, so treat the detail as indicative and check the current requirement with the issuing authority or your employer.
On penalties
The research underpinning this guide could not source an official Chinese government page confirming sanctions for non-participation. No penalty figure is stated here, because none was verified. Any number you encounter elsewhere should be traced to a primary source before you rely on it.
Japan: enrolment follows the address, not the cover
Japan's rule is simpler to state and equally firm. Foreign residents who register an address and are staying more than three months must enrol in public health insurance. There are two routes, and which one applies depends on the employment rather than on choice:
- Employees' Health Insurance, arranged through an employer where the employment qualifies.
- National Health Insurance, arranged at the municipal office, for those not covered by an employer scheme.
Enrolment is generally expected within fourteen days of address registration, and in practice the municipal office handles both together. The standard patient co-payment is 30 per cent of covered treatment costs, with the scheme meeting the balance.
The decisive point for anyone arriving with an international policy: enrolment is compulsory regardless of any private or home-country cover held. There is no equivalence route, no opt-out on the strength of a better policy, and no exemption for holding cover from an insurer at home. Japanese public health insurance is a residence-based obligation, and an international policy is supplementary to it.
A sourcing caution belongs here as well. The research behind this guide confirmed no official Ministry of Health, Labour and Welfare source for the enrolment rule; the position is drawn from municipal government and institutional pages. Consequences reported for late enrolment come from non-official sources, so no penalty is stated here. Ask the municipal office covering your address, since procedure and paperwork vary between municipalities.
What international cover is still doing in both countries
Concluding that international cover cannot substitute is not the same as concluding it is redundant. In both countries it typically does four things the statutory scheme does not.
It funds treatment outside the country — including on home leave, on business travel, and in a repatriation. It addresses the part of the bill the statutory scheme leaves with the patient, which in Japan is the 30 per cent co-payment and in China depends on the local scheme's coverage and reimbursement rules. It buys access to international-standard and English-language facilities, which in major Chinese cities is a substantive difference rather than a comfort. And it provides continuity across a career that moves between countries, which is worth more than it appears at the moment you consider cancelling: dropping cover during a posting and reapplying later restarts underwriting on your health as it then is.
How the money actually moves differs between the two arrangements, and that is worth understanding before a first claim — see direct billing versus reimbursement. Where an employer arranges the local enrolment and a separate international scheme, the interaction between the two is a governance question for the employer as much as the employee: corporate international medical cover covers the structure.
The shared conclusion
For both China and Japan the same sentence applies, and it is the one to take away. The question is never whether your international policy is good enough. It is whether you are legally obliged to enrol locally as well — and in both countries the answer is yes.
That framing is more useful than a benefit comparison, because it separates two decisions that get run together. Compliance is not optional and is not negotiable against policy quality. What cover to hold on top is a genuine planning decision, and it turns on how you travel, where your family is, and what happens when the posting ends. The wider trade-off between international and locally bought cover is set out in IPMI versus local health insurance abroad, and the geographic scope question in area of cover explained.
Before you act on any of this
Rules of this kind change, and the sourcing for both countries in this guide is weaker than for jurisdictions with well-maintained English-language regulator pages: China's position rests on advisory and legal commentary rather than a primary regulator source, and Japan's was confirmed only from municipal and institutional material, with no Ministry of Health, Labour and Welfare page verified. The position reflects research current as at July 2026. No penalty figures appear anywhere above, because none could be verified for either country. Confirm the current requirement with the relevant authority — the local social insurance bureau in China, the municipal office in Japan — or with your employer, before you rely on it.
Two practical steps are worth taking early. Establish, in writing and before you arrive, who is responsible for arranging your local enrolment and by when. And if you are moving on from a country where the answer was different — Singapore imposes no mandate on most expatriates, and Thailand accepts foreign insurers against a prescribed certificate — do not carry the previous country's assumptions with you. A broader system-by-system view is set out in the healthcare systems comparison.
Frequently asked questions
Do foreigners working in China have to join Chinese social insurance?
Yes. The Interim Measures on the participation in social insurance of foreigners employed in China took effect on 15 October 2011. Foreigners legally employed in mainland China, and their employers, are required to contribute across all five branches of the system — pension, medical, work injury, unemployment and maternity — on the same basis as Chinese employees. A private or international medical policy is supplementary to that duty and does not displace it, however comprehensive the policy is.
Does a social security agreement exempt me from Chinese medical insurance?
Usually not. Nationals of countries holding a totalisation agreement with China who remain in a mandatory home scheme are exempt only to the extent of that agreement, and those exemptions are partial rather than blanket. German nationals, for example, are exempt from pension and unemployment contributions only, and South Korean nationals from pension only. Medical insurance is generally not exempted. Check the specific agreement covering your nationality rather than assuming an agreement means a full exemption.
Is enforcement of Chinese social insurance the same across the country?
No. Local enforcement varies materially by city, and this is well documented in advisory commentary — Shanghai has historically been described as the most permissive. Variation in enforcement, though, is not the same as variation in the law. The statutory obligation applies nationally whether or not a particular local bureau pursues it, and local practice can tighten without notice. Confirm the position with your employer and the local social insurance bureau where you will actually be working.
Do I have to join Japanese health insurance if I already have international cover?
Yes. Foreign residents who register an address and stay more than three months must enrol in public health insurance, either Employees' Health Insurance through an employer or National Health Insurance through the municipal office. Enrolment is compulsory regardless of any private or home-country cover held. An international policy is supplementary in Japan; it does not create a right to opt out, and holding one is not an accepted reason for declining to enrol.
What does Japanese public health insurance actually pay?
The standard patient co-payment is 30 per cent of the cost of covered treatment, with the scheme meeting the remaining 70 per cent. That co-payment applies across most medical treatment and is the reason many expatriates hold private cover alongside enrolment rather than instead of it. The distinct roles matter: the public scheme handles the bulk of routine and hospital costs, and private or international cover typically addresses the co-payment, non-covered items and treatment outside Japan.
How quickly do I need to enrol in Japan?
Enrolment is generally expected within fourteen days of registering your address at the municipal office, and the two processes are usually handled together. Employees' Health Insurance is arranged through the employer instead where the employment qualifies. Reported consequences for late enrolment come from non-official sources rather than from the Ministry of Health, Labour and Welfare, so no figure is stated here. Ask the municipal office directly, since procedure varies between municipalities.
Should I cancel my international policy when I enrol locally?
That is a planning decision rather than a compliance one, and the two should not be confused. Enrolment is compulsory either way. What international cover adds is treatment outside the country, choice of hospital and language access, cover for family members whose local enrolment is limited, and continuity if you move on. Cancelling and later reapplying restarts underwriting, so the cost of dropping cover during a posting is often paid at the next application rather than immediately.
This guide is general information only and does not constitute financial, legal, medical or tax advice. Global Investments is not authorised by the Financial Conduct Authority. Insurance products, benefit schedules and premiums are revised regularly, and mandatory health insurance requirements change frequently — in several jurisdictions they are described differently even between official sources. Nothing here is a recommendation of any product or insurer. Confirm the legal position with the relevant regulator or a locally qualified adviser, and confirm cover terms with the insurer, before acting.