Japan Basic Old-Age Pension

Calculate Japan's basic pension amount from contribution months and exemption months (FY2026 basis).

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Calculation basis and official references

Reviewed on:2026-07-27

Multiply full pension amount by the ratio of insured months credited, adjusted by exemption period categories, and divide by total eligible months.

This estimate models the Japanese public old-age pension in principle as of official age and insurance record rules.

Birth year, exemption periods, lump-sum withdrawal, and early/late retirement conditions alter benefits.
Employee pension offsets and survivor additions are not included in this simple estimate.
For a formal amount, confirm using Japan Pension Service records and official notifications.

This is a rough estimate from contribution and exemption months and does not replace official re-calculation with personal pension records.

Who is this calculator for?

Calculate Japan's basic pension amount from contribution months and exemption months (FY2026 basis).

What values should I enter?

Applies to: Japan Pension

How should I interpret this estimate?

This estimate models the Japanese public old-age pension in principle as of official age and insurance record rules.