Every foreign resident in Japan is legally required to be enrolled in health insurance — either through an employer's plan or the National Health Insurance system run by your municipality. This isn't optional, and the consequences of skipping it go beyond unpaid premiums: starting June 2027, the Immigration Services Agency will formally check NHI payment records during visa renewal screening. This guide covers how the system works, what it costs, and what to actually do.
2027 visa enforcement deadline is real
From June 2027, foreign residents with unpaid NHI premiums will in principle be denied visa renewal or status changes. This was formally announced in November 2025 and adopted at an inter-ministerial meeting in January 2026. Roughly 970,000 foreign nationals are enrolled in municipal NHI — of these, only 63% are currently current on premiums. If you're behind, address it before your next renewal window, not after.
115 municipalities now reporting NHI debtors to Immigration — June 2026
A June 2026 newspaper report confirmed that 115 local municipalities are now formally notifying the Immigration Services Agency when foreign residents accumulate NHI debt despite multiple payment warnings. Immigration has already denied 27 visa extension applications as a direct result. This enforcement mechanism is new and significant — NHI debt has always been an obligation, but it is now actively being cross-checked against visa renewal eligibility. If you have outstanding NHI payments, address them immediately regardless of how long they have been outstanding.
NHI vs Employer Insurance — Which Applies to You
If you work for a company that employs you on a regular basis, you're likely covered under shakai hoken — the employer-based system that covers health insurance and pension together, with premiums split between you and your employer. You don't choose this; your employer enrolls you automatically.
If you're self-employed, freelance, between jobs, a student, or working for a company small enough not to offer shakai hoken, you enroll in NHI yourself at your municipal office. There's no employer contribution — you pay the full premium. This distinction is the most important one: NHI premiums can be substantial, and unlike shakai hoken, no employer is absorbing half of them.
Private insurance doesn't exempt you
Having private health insurance — travel insurance, international health insurance — does not legally exempt you from enrolling in NHI or shakai hoken. The requirement is enrollment in the Japanese public system. You can have both, but private insurance alone isn't a substitute.
How NHI Premiums Are Calculated
NHI premiums aren't a flat fee. They're calculated annually by your municipality using two components: an income-based portion (a percentage of your previous year's income above a basic deduction) and a flat per-person rate. The exact percentages vary by city and ward — Tokyo's rates differ from Osaka's, which differ from a smaller regional city's — and are updated each fiscal year.
Use the estimator below to get a realistic figure for your situation:
Use ¥0 if this is your first year in Japan with no prior Japan-source income.
Premium rates vary by municipality and are updated each fiscal year. This calculator uses representative 2026 rates — your actual bill will differ based on your specific ward or city's current schedule. The income-based portion is calculated on your adjusted income after the basic ¥430,000 deduction. Always confirm your actual premium with your municipal NHI office.
Your first year in Japan will be cheaper — but budget for year two
Because NHI is based on your previous year's income in Japan, new arrivals with no prior Japan-source income pay very low premiums in their first year. The second year premium jumps significantly once your actual earnings are on record. This surprises a lot of people — factor it into your year-two budget rather than assuming the first year's figure is what you'll always pay.
2026 annual premium cap
¥870,000 across all NHI components combined. Above this, no additional premium applies regardless of income. The cap covers medical, support, and long-term care portions combined. Individual component caps also apply; your municipality's office can tell you the specific current figures.
Low-Income Reductions — Most New Arrivals Qualify
Japan has an official tiered reduction system for NHI that cuts the flat per-person portion of premiums significantly for lower-income households. The reductions are automatic if you qualify — you don't need to apply separately, but you do need to have filed an income declaration for your municipality to assess your eligibility correctly.
File a zero-income declaration even if you earned nothing
If you had no income in a year and don't file an income declaration, your municipality has no record to assess your NHI reduction eligibility — and may assign you to a higher premium tier by default. Filing a zero-income declaration (which you can do at your local tax office or municipal office) takes roughly 15 minutes and can save you a meaningful amount in premiums.
Enrolling — What to Do and When
Enrollment happens at your local municipal office — the same place where you register your address. You have 14 days from establishing residency (or losing employer-based insurance) to enroll. In practice, you can and should do both address registration and NHI enrollment on the same visit.
What to bring to the municipal office
Residence card (zairyu card), your personal seal (hanko) if you have one — though most offices now accept a signature instead, passport, and if switching from employer insurance, the certificate of loss of insurance (健康保険資格喪失証明書) from your previous insurer.
What NHI Actually Covers
NHI covers 70% of most medical costs at enrolled facilities — you pay the remaining 30% co-payment at the point of care. Dental is covered for medically necessary work but not cosmetic treatment. Prescription drugs are covered on the same 30% co-pay basis. Mental health treatment at licensed psychiatric clinics is covered. Preventive care, health checks, and elective procedures are generally not covered.
High-cost medical care has a monthly cap
If your medical bills in a single month exceed a certain threshold, the high-cost medical expense system (高額療養費) caps your out-of-pocket spending. For most working-age NHI enrollees in 2026 the monthly cap is approximately ¥80,100 plus 1% of costs above ¥267,000. You need to apply for this reimbursement after the fact — it isn't automatic at the point of payment.
Official Sources
This article references the following primary sources. Rules and figures change periodically — always verify current requirements directly before making decisions.