Does the US–Japan totalization agreement cover my Social Security?
Short answer: Yes, generally. The US–Japan Social Security agreement, in force since 1 October 2005, prevents paying into both countries' systems on the same earnings and allows periods of coverage in each country to be combined (totalized) so people who worked in both can qualify for benefits they might otherwise miss. It covers US Social Security and the main Japanese pension and health insurance systems, but not Japan's National Pension Fund, Employees' Pension Fund or the non-contributory Old-Age Welfare Pension.
Written and reviewed by Anthony Walsh, Selanis. Last reviewed 2026-10-09.
Why it works this way
Without the agreement, an American sent to work temporarily in Japan by a US employer could be liable for contributions to both the US and Japanese systems on the same salary; the agreement generally keeps a transferred employee under their home system's coverage for a set period rather than both.
Totalization matters most for people who have worked substantial periods in both countries but not long enough in either alone to qualify for benefits — combining the two work histories can create eligibility for a benefit that neither country's record alone would support.
The agreement does not cover every Japanese retirement-related scheme; occupational pension funds and means-tested non-contributory programs sit outside it, so a full picture of someone's Japanese retirement income needs to check each program separately against the agreement's scope.
The expensive mistake: Assuming all Japanese pension contributions count toward US Social Security
Only coverage under the systems specifically named in the agreement totalizes. Contributions to excluded schemes do not count toward US eligibility.
What to do
- Request a certificate of coverage before a Japan assignment begins — This is what exempts a transferred employee from double contributions.
- Track your work history in both countries — Keep records that support a totalization claim later.
- Check which Japanese schemes you contributed to — Confirm whether they are covered by the agreement before assuming they count toward a US benefit.