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Japan calculators

Japan money, for people living there or planning to move — what your salary really leaves you after tax, and whether back-paying missed pension months is worth it.

Tools in this hub

Japan Expat Finance Toolkit — Salary take-home pay with the Year-2 resident-tax trap, Furusato Nozei limit and pension refund.
Japan Pension Back-Payment Simulator — Cost of back-paying missed National Pension months, the pension uplift and your break-even age.

Every tool runs entirely in your browser — no sign-up, no paywall. Results are estimates for planning; confirm binding figures with the official source linked on each tool page.

Frequently asked questions

What does the take-home pay calculator cover?

Salary after income tax, resident tax and social insurance — including the Year-2 resident-tax trap, the Furusato Nozei limit and the pension refund.

Is back-paying pension months worth it?

The simulator compares the back-payment cost with the pension uplift and your break-even age. Note the 10-year deadline and the surcharge from the third fiscal year.

Are these official figures?

The tools are built from Japan's official rules; results are estimates for planning — confirm binding figures with the official authority.

Do I need an account?

No — every tool runs entirely in your browser, with no sign-up and no paywall.