Japan's Social Security Agreements: Which Countries Qualify and What It Means for Your Pension

Last updated: February 2026 | Reflects Austria agreement (effective December 2025) and US Social Security Fairness Act (January 2025)

If you're a foreign national working in Japan, you're paying into Japan's pension system. But what happens to those contributions when you leave — and can they count toward your pension back home? The answer depends largely on whether your country has a social security agreement with Japan.

These bilateral treaties solve two major problems: they prevent you from paying pension premiums in two countries at once, and — in most cases — they let you combine contribution periods across countries to qualify for pensions you might otherwise miss out on.

Japan currently has agreements with 24 countries. This guide explains how the system works, which countries are covered, and how to decide between claiming a lump-sum withdrawal and preserving your contribution period for totalization.

What Social Security Agreements Do

Social security agreements address two problems that affect foreign workers worldwide.

Problem 1: Double contributions. Without an agreement, a German employee transferred to Tokyo might be required to pay into both Germany's and Japan's pension systems simultaneously — an expensive redundancy.

Problem 2: Lost contribution periods. A French worker who spends 4 years in Japan might not qualify for Japan's old-age pension (which requires 10 years) and may find that those 4 years count for nothing in either country.

Agreements fix these through two mechanisms: dual coverage prevention (eliminating double payments) and totalization (letting you combine periods from both countries to meet qualification thresholds).

One critical point: totalization counts periods only, not money. If you qualify for Japan's pension through totalization, the pension amount is calculated based solely on your Japan contributions. Japan doesn't pay you for time worked in your home country, and vice versa. Each country pays its own share independently.

Type A vs. Type B: Not All Agreements Are Equal

Japan's 24 agreements fall into two categories with significantly different benefits.

Type A: Dual Coverage Prevention + Totalization (20 Countries)

Germany, United States, Belgium, France, Canada, Australia, Netherlands, Czech Republic, Spain, Ireland, Brazil, Switzerland, Hungary, India, Luxembourg, Philippines, Slovakia, Finland, Sweden, and Austria (effective December 1, 2025)

Nationals of these countries benefit from both dual coverage prevention and period totalization.

Type B: Dual Coverage Prevention Only (4 Countries)

United Kingdom, South Korea, China, Italy

These agreements do not include totalization. Contribution periods in Japan cannot be counted toward your home country's pension qualification, and Japanese periods remain isolated. If you're from a Type B country and leave Japan with fewer than 10 years of contributions, your only option for recovering premiums is the lump-sum withdrawal payment.

How Dual Coverage Prevention Works

The 5-Year Rule

If your home-country employer sends you to Japan on a temporary assignment expected to last 5 years or less, you can remain enrolled exclusively in your home country's pension system and be exempt from Japan's pension contributions.

Some agreements allow extensions of approximately 3 additional years beyond the initial 5-year period. If the assignment exceeds the permitted duration, you must enroll in Japan's system.

Certificate of Coverage

To claim the exemption, you need a Certificate of Coverage (適用証明書) from your home country's pension authority — for example, the SSA in the United States, Deutsche Rentenversicherung in Germany, or HMRC in the United Kingdom. Your employer typically handles this application.

Present the certificate to your Japanese employer or the local pension office, and Japan's enrollment requirement is waived for the approved period. Keep in mind that processing times vary by country — some authorities issue certificates within weeks, while others may take several months. Starting the application well before the assignment begins is strongly recommended.

The certificate must be carried (or accessible) during your time in Japan. If Japanese authorities request proof of your exemption — for example, during a social insurance audit of your employer — the certificate serves as your documentation.

Who Doesn't Qualify

The dual coverage exemption applies to company-dispatched workers (intra-company transfers, secondments). If you moved to Japan independently and found employment through local hiring — which describes most foreign residents — the exemption does not apply. You must enroll in Japan's pension system regardless of your nationality or any existing agreement.

Additionally, the scope of what's exempted varies by agreement. Some cover only pension contributions; others also exempt you from health insurance premiums. Check the specific terms for your country.

How Totalization Works (Type A Only)

Combining Periods to Qualify

Even if your Japan contribution period falls short of the 10-year threshold, you can combine it with periods from a Type A agreement country to meet the requirement.

Example: A US citizen works 25 years in the United States and 3 years in Japan. The 3 years alone don't qualify for Japan's pension, but combined with the US period (25 + 3 = 28 years), the 10-year threshold is met. Japan will then pay a pension based on those 3 years of Japanese contributions — a small but lifetime-guaranteed income stream.

The Bilateral Limitation

Because these are bilateral (two-country) agreements, you cannot totalize across three or more countries simultaneously.

Example: Someone who worked 5 years in Germany, 3 years in Japan, and 4 years in France has 12 total years. But the Japan-Germany agreement only sees 8 years (3+5), and the Japan-France agreement only sees 7 years (3+4). Neither reaches 10 years, even though the combined total across all three countries would. There is no mechanism to pool periods from multiple agreement countries into a single calculation.

How to Apply

To use totalization for a Japanese pension: Visit a pension office (年金事務所) in Japan with documentation of your home-country contribution periods.

To use Japanese periods for your home-country pension: Contact your home country's pension authority. You'll typically need a "Confirmation of Pension Coverage Periods" (年金加入期間確認通知書) from the Japan Pension Service, which you submit to your home institution.

Country-Specific Notes

United States

The US-Japan agreement is one of the most utilized. US Social Security requires 40 credits (roughly 10 years of work) for retirement benefits. Japanese contribution periods can help meet this threshold through totalization.

Major 2025 development: The Social Security Fairness Act, signed into law on January 5, 2025, repealed the Windfall Elimination Provision (WEP). Previously, WEP reduced Social Security benefits for people who also received pensions from systems that didn't pay into Social Security — including Japan's pension. With WEP eliminated, US citizens and permanent residents who worked in Japan can now receive both their full US Social Security benefits and their Japanese pension without any reduction. The repeal is retroactive to benefits payable from January 2024 onward.

This is a significant financial improvement for Americans with Japan work history. Totalization now becomes even more attractive, since the Japanese pension no longer triggers a penalty on the US side.

United Kingdom

The UK agreement is Type B only — no totalization. UK State Pension qualification requires 10 years of National Insurance contributions, and Japanese periods cannot count toward this. British nationals who leave Japan before accumulating 10 years of contributions are limited to the lump-sum withdrawal.

South Korea and China

Both agreements are Type B. Despite the large number of Korean and Chinese nationals working in Japan, period totalization is not available. Workers from these countries who don't reach the 10-year threshold can only recover premiums through the lump-sum withdrawal.

Australia

Australia's agreement is Type A, allowing totalization. Australia's Age Pension operates on a means-tested basis rather than a contribution-based model, so the interaction differs from most other countries.

Important: Australia's Superannuation (employer-funded retirement savings) is a separate system not covered by the social security agreement. Superannuation and Japan's pension operate independently. The agreement covers only the Age Pension and Japan's public pension systems.

Austria (Effective December 2025)

Japan's newest agreement partner (24th country). A Type A agreement providing both dual coverage prevention and totalization. Austrian nationals temporarily assigned to Japan (5 years or less) can maintain their Austrian pension enrollment exclusively, and contribution periods in both countries can be combined for qualification purposes.

Lump-Sum Withdrawal vs. Totalization: A Decision Framework

For Type A country nationals leaving Japan, this is the most consequential pension decision you'll make. Here's how to think through it.

When Totalization Is Usually Better

You're close to meeting your home country's qualification threshold. If your home country requires 10 years and you have 7 at home plus 3 in Japan, totalization gives you a qualifying pension. A lump-sum withdrawal of roughly ¥157,590 (3 years of National Pension) pales in comparison to decades of pension payments.

You might return to Japan. Claiming the lump-sum erases your entire contribution history. If you come back and work again, you start from zero. Preserving your period means future contributions build on past ones.

You're thinking long-term. Even a small Japanese pension adds up. Five years of National Pension contributions, preserved through totalization, yield approximately ¥103,963 per year from age 65. Over a 20-year retirement, that's roughly ¥2.08 million — far more than the ¥525,300 lump-sum maximum for the same period.

When the Lump-Sum May Be Better

Your home country's pension is already secured. If you've already met your home qualification threshold with room to spare, the marginal value of adding Japanese years is limited. The immediate cash from a lump-sum may be more useful.

Your country is Type B or has no agreement. Without totalization, Japanese periods can't help your home pension qualification. The lump-sum withdrawal is your only recovery option if you leave before 10 years.

You contributed well over 5 years (until the cap increases to 8 years). Currently, the lump-sum only covers 60 months of contributions but erases your entire history. If you have 7+ years, you're giving up more than you receive. However, if you have no other use for the Japanese periods, partial recovery may still beat zero recovery.

What If Your Country Has No Agreement?

Workers from countries without a social security agreement — including Vietnam, Thailand, Nepal, Myanmar, Indonesia, Bangladesh, Nigeria, and many others — face the toughest situation.

Double contributions are unavoidable. You must pay into Japan's system and may still owe premiums to your home country's system, with no mechanism to avoid the overlap.

No totalization is available. Japanese contribution periods cannot count toward your home pension, and vice versa.

Your options: Either accumulate 10+ years in Japan to qualify for the old-age pension, or claim the lump-sum withdrawal when you leave. For the hundreds of thousands of technical intern trainees and specified skilled workers from Southeast and South Asian countries, the lump-sum withdrawal serves as the primary mechanism to avoid complete premium loss.

Japan continues to negotiate new agreements, and future expansions are possible. Given the large and growing populations of Vietnamese, Indonesian, and Nepali workers in Japan, these countries are frequently mentioned as potential future agreement partners, though no formal timeline has been announced. Check the Ministry of Health, Labour and Welfare website for the latest status on ongoing negotiations.

Quick Reference Summary

Related Articles

• ① Japan's Pension System Explained for Foreign Residents — Understand the full system before making decisions
• ② Lump-Sum Withdrawal Payment Complete Guide — Detailed calculation and application steps
• Health Insurance Pillar Guide — The other half of Japan's social insurance system
• Tax Implications in Your Home Country — How Japanese financial accounts interact with your home tax system

This article provides general information based on agreements in effect as of December 2025. Social security agreements vary in their specific terms, and individual circumstances affect eligibility. For personalized advice, consult the Japan Pension Service social security agreement pages or a qualified social insurance labor consultant (社会保険労務士).

Does your country have a social security agreement with Japan? Have you navigated the totalization process, or did you opt for the lump-sum withdrawal? For those from countries without an agreement — how has the double contribution burden affected you? Share your experience in the comments!