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This is a current-system snapshot of National Health Insurance (国保) and the National Pension — not individual legal advice or a window's final ruling. For most students the point isn't whether to opt in, but realising you may already be on a track where enrolment is required: if you have an address in Japan you're generally an NHI insured person, and from age 20 you generally enter the National Pension.
Premiums, thresholds and procedures change by municipality and year. Below are stable, top-of-site links — always verify specific figures and steps from the latest official source here.
Before any figures — so you don't get the direction wrong. This is where most students lose out.
MythThinking "I'm a student / I have no income, so NHI can wait."
ActuallyWithout NHI, many municipalities treat medical costs incurred before enrolment as fully self-paid, and back-charge premiums to when your eligibility actually began.
SoRegister your address, then visit the NHI counter early.
MythThinking "I'll just not pay the pension and not apply for anything."
ActuallyNot applying for the student payment exception isn't saving — it exposes your future old-age, disability and survivor pension eligibility to the risk of non-payment. The exception still counts toward your eligibility period and keeps disability/survivor protection intact.
SoAt 20, apply for the student payment exception first.
MythThinking "if you can't show an insurance card, renewal is automatically refused."
ActuallyRenewal for ordinary students isn't judged solely on insurance proof. But high or long-running non-payment of NHI premiums etc., reaching a malicious level, is treated by Immigration as a negative factor.
SoResolve it early; later residence reviews raise the risk.
If you're neither enrolled in a workplace health plan nor a dependent of one, "being a student" is not a reason to opt out. NHI is a main gateway to public medical-insurance coverage.
MHLW states that anyone with an address in Japan is an NHI insured person unless they fall into an excluded group — members of another health plan, welfare recipients, the late-elderly medical system, short-stay foreigners, etc. Ordinary student status does not automatically fall into that excluded box.
Becoming insured, withdrawing, etc., must in principle be reported to your municipality within 14 days.
NHI isn't an optional perk — it's the main gateway to public medical coverage. Ordinary visits are settled at your co-pay rate (generally 30% for under-70s); even without a Myna insurance card, the insurer issues a free 資格確認書 (eligibility-confirmation document) to be seen at the same rate. Only with eligibility do the 30% co-pay, high-cost care benefit and Myna card / 資格確認書 become usable.
NHI premiums aren't uniform nationwide: each municipality combines an income levy, per-capita levy and per-household levy, with the income levy computed from "last year's income minus basic deduction". For students with almost no Japanese income last year, [meyasu] the income levy is near zero, leaving mainly per-capita/per-household levies plus a low-income reduction — so year one is often lighter than later years. That's not a student discount; it's how prior-year-income billing works.
Amounts change by municipality and year — always check your municipality's latest page for the exact rates.
Households below the statutory income thresholds get a 70/50/20% reduction on the per-capita and per-household levies; first-year students most often hit the 70% tier. But the municipality must be able to see your income status — even with zero income you must file a residents-tax declaration, or the reduction can't be assessed. Discretionary reductions (hardship, sudden income drop, disaster) are a separate scheme, usually needing a separate application [verify].
"No income = automatic reduction" is false. Without the residents-tax declaration, the basis for assessing the reduction is missing.
When your monthly out-of-pocket exceeds a cap set by age and income, the excess comes back as the high-cost care benefit. With a Myna insurance card, many cases are capped right at the window, so you avoid fronting a large sum and then filing paper claims. It's the key reason students needn't over-worry about big medical bills.
If you don't have a Myna insurance card, the 資格確認書 still lets you receive insured care at your co-pay rate. Note: the "資格情報のお知らせ" (eligibility-info notice) alone is not proof for a visit — what replaces the old insurance card is the 資格確認書.
Having a My Number card does not by itself complete NHI/social-insurance enrolment — the enrolment procedure is still separate.
Late enrolment means that, absent unavoidable reasons, medical costs before your declaration date are in principle fully self-paid, and premiums are back-computed to when eligibility began. Conversely, if you've lost old NHI eligibility (through employment, moving out, or going home) but keep using the old 資格確認書, some municipalities later reclaim the 70–80% NHI had covered.
Remember: delaying isn't a saving — you're prone to hitting "full self-pay" and "back-billing" at the same time.
For households below the statutory income thresholds. Threshold amounts vary by municipality and year, so only the rate tiers are shown here; verify the actual thresholds and eligibility with your municipality.
The big correction is "I'm a student, so it doesn't apply." Residents aged 20–59 in Japan generally enter the National Pension and must pay premiums. The system covers not just old age but disability and survivor pensions for serious illness, injury or death when young.
Per the Japan Pension Service, residents aged 20–59 are in principle insured persons who pay premiums. The FY2026 premium is 17,920 yen/month [meyasu]. Students aren't an "exempt category" — they lower risk via the student payment exception, an "apply-then-defer" scheme.
Students at qualifying schools whose own prior-year income is below a threshold can apply to defer premiums while enrolled. It's judged on your income — family income is, in principle, irrelevant. The 2026 personal-income threshold is "1.28M yen + 380k × number of dependents + social-insurance deductions, etc." [verify]. Apply at your registered municipality's pension counter or a pension office (some schools file on your behalf), or electronically. The year runs Apr–Mar, and you can generally backdate to 2 years 1 month before the month of receipt.
The income-threshold figures change yearly — confirm the latest with the Japan Pension Service or a pension office.
An approved student-exception period doesn't add to your old-age pension amount, but it does count toward the eligibility period, and in case of disability or death it can be used to judge disability/survivor pension eligibility. The Japan Pension Service warns that if you apply too late and a disability arises before applying, you may not receive the disability basic pension. It's closer to "leaving your protection eligibility blank for a month" than "just paying one month less."
Applying late may mean you cannot receive the disability basic pension for a disability that arose before you applied.
If you stop being a student (e.g. withdrawal) during an approved exception period, you must report it. The general exemption/deferral doesn't apply to students — students use the student exception. If after graduating you haven't yet found work and remain a Category-1 insured person, don't carry over the "student" framing; switch promptly to exemption/deferral or normal payment. If you join a covered employer, the employer handles health-insurance/employees'-pension enrolment, and you must remember to file loss of old NHI eligibility.
Many students aren't "student → straight home" but "student → job-hunt → awaiting onboarding / status change," and easily fall into an un-reported grey zone.
"The pension is money you never get back" is incomplete for foreign students. Under the Japan Pension Service's lump-sum scheme, a non-Japanese national who loses insured status and leaves Japan can, if conditions are met, apply within 2 years of departure. For the National Pension this requires: not having reached the 10-year old-age eligibility, having no address in Japan, not having acquired related disability-pension rights, and 6+ months of combined paid-premium periods. You can even file a moving-out notice before leaving and have the claim arrive after the (planned) departure date.
But what counts is the actually-includable paid-premium periods. Be sure to read the trap below.
| Option | Effect on eligibility & future amount | Note |
|---|---|---|
| Pay monthly now | Every month counts fully toward your future old-age pension amount; eligibility and protection are strongest. | Safest when you can afford it. |
| Apply for the student exception | Your eligibility period is preserved and disability/survivor protection stays stable, but this period doesn't directly increase the old-age amount. | To boost it later, top up within 10 years; one year of top-up adds roughly +20,000 yen/year to the future pension [meyasu]. |
| Do nothing (non-payment) | The worst position across old-age eligibility, amount, and disability/survivor eligibility — the worst move. | If you can pay yet don't for long, it escalates to demands, reminders, seizure and late charges. |
Illustrative amounts by total paid-in months; confirm exact amounts and conditions with the Japan Pension Service.
Trap: the lump sum looks at the actually-includable paid-premium periods, not at whether you were once a student. The combined months the Japan Pension Service lists are fully-paid months plus converted months actually paid after partial exemption — the student exception and deferral are not counted on their own. So if you held only the student exception throughout your studies and never topped up, that period generally does not become months eligible for the lump sum — "the exception preserves eligibility" ≠ "cash is guaranteed when you go home."
The practical order is simple — register your address first, then NHI, then sort out the 20-and-over pension framing.
NHI is normally handled at the insurance counter after you've completed residence registration. NHI enrolment/withdrawal must in principle be done within 14 days of the triggering event. The student exception can also be filed at your municipality's National Pension counter. In short: register your address, then enrol, then sort the over-20 pension framing.
A cross-municipality move must usually be reported within 14 days of the new address. NHI ends in the old area and re-enrols in the new one — not "NHI is nationwide so no change needed." For pensions, if your My Number is linked to your basic-pension number, many address changes need no separate filing; if unlinked or in specific cases, you still file an address change with the municipality or pension office.
Safest rule of thumb: "NHI always involves both old and new municipalities; the pension usually follows resident info, but whether you must also file depends on number-linkage status."
First, if after graduating you're not yet absorbed into a company's social insurance, don't drag on "in student exception" — switch promptly to normal payment or exemption/deferral. Second, if hired by a covered employer, the company handles health-insurance/employees'-pension enrolment, and you must file loss of old NHI eligibility within 14 days.
The general exemption/deferral doesn't apply to students — while a student, always use the student exception.
Going home isn't just buying a ticket. On NHI, an overseas move-out requires filing loss of eligibility, and using old eligibility documents after the move-out date can lead to medical-cost reclaim. On the pension, confirm whether you meet lump-sum conditions, whether to file the resident-register move-out before leaving, and when documents reach the Japan Pension Service. In short: going home means leaving the resident register, settling NHI, and checking whether to claim the lump sum — not just checking out of your room.
Continuing to use the old 資格確認書 after the move-out date can lead to NHI reclaiming the medical costs it advanced.
The key here is not to write it as a scare. The accurate line is: "not the sole criterion / but high or long non-payment is a negative factor."
Immigration's general guidance states clearly that it will not refuse a status change or renewal solely because you can't produce a health-insurance card. So "no insurance card = renewal definitely impossible" is not accurate.
The same guidance also states that high or long non-payment of legally-due NHI premiums etc., reaching a malicious level, is treated as a negative factor in review. In permanent-residence, highly-skilled-professional and specified-skill procedures, it does require materials on NHI enrolment and payment status, or urges resolving NHI/National-Pension public duties before applying. So the accurate line for students isn't "owing NHI/pension definitely affects every renewal," but rather: [verify] ordinary student renewal isn't judged solely on insurance proof, yet long-running disorder in social insurance and public dues clearly raises risk — especially when moving to work-type status, highly-skilled or permanent residence after graduation.
Neither panic nor neglect. Clearing arrears before a post-graduation status change or permanent residence is the prudent move.
The pension is fairly clear-cut; NHI can't be pinned in one line (set by municipalities, tied to prior-year income). Everything below is [meyasu].
The National Pension is 17,920 yen/month in FY2026, about 215,040 yen/year if paid in full [meyasu]. This is uniform nationwide and doesn't vary by income or municipality.
NHI rates are set by municipalities and tied to prior-year income. [meyasu] For someone newly arrived, with almost no Japanese income last year, single, under 40, and correctly assessed at the 70% reduction, FY2026 official rates work out to roughly 19,914 yen/year (≈1,660/mo) in Kyoto and 21,459 yen/year (≈1,790/mo) in Sapporo. Many students' first year isn't necessarily high, but from year two the amount shifts clearly as last year's part-time income rises.
"Low four-digit yen per month" is only a first-year low-income sample, not a fixed price. It changes substantially with your municipality and prior-year income.
The NHI samples are only first-year low-income cases, not fixed prices; from year two they change with last year's part-time income.
Finally, the most common myths, unpacked one by one.
Myth"The pension is money you pay and never get back."
TruthIncomplete. The student exception preserves your eligibility period and disability/survivor protection, and foreigners who meet conditions can apply for the lump sum after leaving. But the lump sum looks at includable paid periods, not at "whether you were once a student."
Myth"No income means I don't need to bother."
TruthWrong. NHI's low-income reduction generally assumes the municipality can see your income status — many places require a residents-tax declaration even with no income. For the pension, unless you apply for the student exception or post-graduation exemption/deferral, doing nothing means non-payment.
Myth"I'm here briefly to study / I'm a student, so I don't need NHI."
TruthWrong. MHLW's line is that anyone with an address in Japan who isn't in an excluded group joins NHI; the excluded are short-stay foreign residents etc. Ordinary student status doesn't automatically fall into that excluded box.
Myth"Once I've got the student exception, I never need to top up."
TruthWrong. The exception preserves eligibility but doesn't directly feed the old-age amount. To add it to the amount you must top up within 10 years, and top-ups from the third fiscal year after approval carry an add-on.
Myth"If I have a My Number card, I'm automatically enrolled."
TruthWrong. As the Digital Agency states, enrolment with a new insurer is still a separate step. The Myna insurance card solves "how to prove your insurance eligibility," not "automatically completing NHI/social-insurance enrolment."
Myth"Owing a bit of NHI or pension won't affect my visa."
TruthYou can't say that. The safer official line is: it won't refuse you solely because you can't show insurance proof, but high or long non-payment of NHI premiums etc. is treated as a negative factor — be especially careful with post-graduation work-type and permanent-residence procedures.