This is one of those admin decisions where doing nothing feels the same as doing something — but it isn't. Mio doesn't do vibes. Here's the mechanical difference between not paying and applying for an exemption, read straight from the Japanese-language official sources.
Broadly, residents of Japan aged 20–59 who aren't covered by an employer's Employees' Pension are enrolled in the National Pension as "Category 1" insured persons. In practice that's freelancers and self-employed people, students, part-timers below the employer-enrollment threshold, and people who are currently unemployed. This includes foreign residents — being a foreigner doesn't exempt you, and it doesn't disqualify you from the relief systems either.
If you're not sure whether you should be paying at all, start here: Do foreigners in Japan have to pay into the pension? →
There's a critical distinction the official material makes between unpaid months and exempted months:
In other words: an exempted month and an unpaid month can look identical in your bank account (¥0 out), but they are not the same on paper. One protects you; the other quietly costs you protection. That's the whole point of this page.
If you're an enrolled student with income under a certain threshold, you can apply for the Student Payment Special System. Instead of paying now, your contributions are postponed — and while approved, those months still keep your disability/survivor coverage and count toward eligibility, even though you're paying nothing during your studies.
Two things to hedge on: you generally have to re-apply each year, and postponed months don't automatically raise your future pension amount unless you back-pay them later (see below). Verify current income limits and eligible-school rules with your city office or the Japan Pension Service.
If you're not a student but your income is low, there's a separate contribution exemption with tiers based on your (and often your spouse's / household's) prior-year income:
| Tier | Roughly what it means |
|---|---|
| Full exemption | Pay ¥0 for approved months |
| 3/4 exemption | Pay about a quarter of the contribution |
| Half exemption | Pay about half |
| 1/4 exemption | Pay about three-quarters |
Tiers and their income thresholds are set by rule and can change year to year — Mio is deliberately not quoting exact yen thresholds here because they move. Confirm the current figures at your city/ward office. For partial tiers, note you must still pay the remaining portion, or the month can fall back to "unpaid."
Approved exempted months count toward your pension eligibility, and even partially toward your future Old-age Basic Pension amount. But if you want those months to count at the full rate, you can back-pay (catch up) — the official guidance describes recovering past exempted periods within roughly the last 10 years (an adjustment may be added to older amounts). This is a genuine advantage of applying: you buy yourself the option to top them up later, once you can afford it. Silent non-payment doesn't give you that clean option in the same way.
Nothing here happens by itself. To get an exemption, deferral, or the student special system, you generally:
If you're weighing leaving Japan and wondering what happens to what you've paid, read this next: Leaving Japan — can you get your pension money back? → And for the full arrival-and-admin checklist, see the Japan settling-in roadmap →.
If you truly can't pay Kokumin Nenkin this month, apply — don't ghost it. Applying for the student special system or a low-income exemption turns a damaging "unpaid gap" into a protected "exempted period" that keeps your disability and survivor cover and can be topped up within about ten years. Same ¥0 today, very different position tomorrow. The catch is that it's application-based: the system won't do it for you.
Mio