Do You Qualify for a Japanese Pension? The 10-Year Rule

Quick Answer: You need 10 years of qualifying coverage, not 25 — the threshold was cut on 1 August 2017. Paid months count, formally exempted months count, and a narrow set of "aggregation periods" count. If you have pension years in another country, those usually reach you through a social security agreement, not through the Japanese rules.

The most common reason a foreign resident writes off their Japanese pension is a number that stopped being true nearly a decade ago. Until August 2017 you needed 25 years to get anything at all. A great deal of English-language advice was written before that, and still says foreigners never qualify.

Ten years is a different proposition entirely. This guide is about the eligibility test specifically: what counts, what doesn't, and the two mechanisms that most often decide a borderline case. For what you'd actually receive once you qualify, see how much Japanese pension will you actually get.

This is educational information, not financial or pension advice. Eligibility depends on your individual record and, where relevant, on a treaty between Japan and another country — confirm your position with the Japan Pension Service.

What exactly does the 10-year rule count?

The qualifying period (受給資格期間) is a sum of three different things, and they are not equal:

What Counts toward eligibility Counts toward the amount
保険料納付済期間 — months you paid Yes Yes
保険料免除期間 — months formally exempted Yes Partly — see below
合算対象期間 — aggregation periods Yes No

The distinction in that last column is the whole game. You can clear ten years and still receive very little, because some of those months build eligibility without building value.

Filing something always beats filing nothing. A month you simply didn't pay, with no exemption on file, is worth nothing at all — not toward the ten years, not toward the amount. But the routes differ more than people expect: a full exemption (免除) counts toward the ten years and at 4/8 of a paid month toward the amount, while a student deferral (学生納付特例) or payment deferral (納付猶予) counts toward the ten years and adds nothing to the amount unless you back-pay. Details in pension categories 1, 2 and 3.

Exempted and deferred months can be back-paid (追納) within 10 years, with a surcharge if you're more than about three years late — and for a student-deferral year, back-paying is the only way it ever adds to your pension.

What are 合算対象期間, and will they help you?

These are the "empty periods" — カラ期間 — that count toward the ten years but add nothing to your pension. They're the mechanism people hear about and hope will rescue their record.

Here's the honest answer for most foreign residents: probably not.

Read the list and the pattern is clear. It covers Japanese nationals who lived abroad without voluntarily enrolling; students before April 1989; spouses of employees who didn't voluntarily enrol before April 1986; Diet members; and foreign nationals resident in Japan before December 1981, when foreigners were excluded from the National Pension — and only for those who later took Japanese nationality or permanent residence.

Almost all of it is either historical or written for Japanese nationals. If you arrived in Japan this century, most of these categories cannot apply to you.

The one modern exception worth knowing: months you were covered by the employees' pension while under 20 or over 60 count as 合算対象期間. If you worked as a company employee in Japan before turning 20, or keep working past 60, those months push you toward the ten years even though they don't raise the payment.

What if you have pension years in another country?

This is where the real leverage is, and it's a completely different mechanism.

If your home country has a social security agreement with Japan, your contribution periods there can be totalised with your Japanese ones to meet the ten-year test. Eight years in Japan and several in a treaty country may well clear the bar, where eight years alone would not.

That is not 合算対象期間 — it's a treaty, it depends entirely on which country, and the terms differ between agreements. It is the single most valuable thing to check if you have a working history split across countries. See Japan's social security agreements.

And one warning that belongs here rather than anywhere else: claiming the lump-sum withdrawal (脱退一時金) erases the record you'd otherwise totalise. People take the refund on leaving without realising it spends the very years that would have qualified them later. The trade-off is covered in getting your pension refund when leaving Japan.

What if you're short of ten years?

Several routes exist, and they're worth knowing before you conclude you've missed it:

Which of these is available depends on your status, age and nationality — this is a question for the Japan Pension Service rather than a rule you can read off a page.

How do you check where you actually stand?

Don't estimate this. The Japan Pension Service sends an annual ねんきん定期便 to your registered address around your birthday month, showing your recorded months. ねんきんネット gives you the same record online.

Two things worth doing once, properly:

  1. Confirm your record is complete. Job changes, category switches and periods of unemployment are where months go missing.
  2. Check your total against ten years, remembering that aggregation periods count toward it, exempted months count at reduced value toward the amount, and deferred months count toward neither until back-paid.

Then model what that record actually produces in the Japan Pension Estimator, and see the whole picture in Japan pension for foreigners.

Frequently Asked Questions

How many years do I need to qualify for a Japanese pension?

Ten. The qualifying period was reduced from 25 years to 10 on 1 August 2017, so a great deal of older English-language advice is out of date. The ten years can combine paid months, formally exempted months and aggregation periods.

Do my years working abroad count toward the Japanese 10-year rule?

Not through the Japanese rules themselves — 合算対象期間 mostly covers Japanese nationals abroad and historical cases. Years abroad usually reach you through a social security agreement between Japan and that country, which allows periods to be totalised to meet the threshold.

What is 合算対象期間 and does it apply to foreigners?

They are periods that count toward eligibility but add nothing to the amount. Most categories are historical or written for Japanese nationals — the main modern one that applies broadly is employees' pension coverage while under 20 or over 60. Foreign nationals resident before December 1981 have their own category, but only if they later took Japanese nationality or permanent residence.

Do unpaid months count toward my Japanese pension?

Only if they were formally exempted. An exempted month counts toward the ten years and at reduced value toward the amount; a month you simply didn't pay counts for neither. This is why applying for exemption matters even when you have no income to pay from.

How do I check how many years I have?

The Japan Pension Service sends an annual ねんきん定期便 around your birthday month, and ねんきんネット shows the same record online. Check it rather than estimating — missing months usually appear around job changes and category switches.

PlanTogetherFI is for educational planning only. It is not financial, tax or pension advice. Eligibility depends on your individual contribution record, your nationality and status, and where relevant on treaties between Japan and other countries — confirm your position with the Japan Pension Service or a qualified professional.

Sources and further reading

Rules reflect the position as of August 2026. Confirm your own record and eligibility with the Japan Pension Service.