Instant answer for ¥4,000,000 gross salary
On a ¥4,000,000 gross salary, your Japan take-home pay is approximately ¥3,181,815/year (¥265,151/month), an effective deduction rate of 20.5% after national income tax, the reconstruction surtax, resident tax, and employee social insurance.
Annual take-home
¥3,181,815
After all tax & insurance
Monthly net pay
¥265,151
If spread evenly
Effective rate
20.5%
Tax + social insurance
Here's exactly where your ¥4,000,000 gross salary goes, after the employment income deduction and basic deduction are applied to arrive at taxable income of ¥1,557,000.
National income tax
¥77,850
Reconstruction surtax (2.1%)
¥1,635
Resident tax (~10%)
¥155,700
Health insurance
¥197,000
Employees' pension insurance
¥366,000
Employment insurance
¥20,000
Resident tax is shown at its steady-state ~10% rate; it's actually billed on the previous year's income, so new arrivals typically pay less in year one. Assumes employee is under 40 (no nursing care insurance) unless noted otherwise above.
Japanese compensation is rarely paid as one smooth monthly amount. A ¥4,000,000 package commonly breaks down into roughly ¥275,862 in monthly base salary, paid 12 times a year, plus about ¥689,655 split across a summer bonus (typically June/July) and a winter bonus (typically December), together often worth 2-6 months of base pay at tech employers. Bonuses are withheld using a simplified rate table rather than the full progressive calculation used here, but roughly net out to a similar effective rate over the full year. Use the "Monthly base + bonus" mode on the main calculator to model your specific offer.
A ¥4,000,000 gross salary in Japan takes home approximately ¥3,181,815 per year (about ¥265,151/month) after national income tax, the 2.1% reconstruction surtax, resident tax, and employee social insurance (health, pension, employment insurance). That's an effective deduction rate of 20.5%.
A common structure for a ¥4,000,000 package is roughly ¥275,862 in monthly base salary paid 12 times a year, plus around ¥689,655 split across a summer bonus (June/July) and a winter bonus (December). The exact bonus size varies by employer and performance, and isn't contractually guaranteed the way base salary is.
Resident tax (¥155,700/year in this estimate) is billed on your PREVIOUS calendar year's income, not your current salary. If this is your first year working in Japan, you'll likely pay little or none of this amount until it catches up the following June. This figure represents your steady-state resident tax from year two onward.
On ¥4,000,000, social insurance (health, pension, employment, and nursing care if applicable) totals ¥583,000, national income tax plus the reconstruction surtax totals ¥79,485, and resident tax adds ¥155,700. Health and pension premiums are capped at a monthly earnings ceiling, so the social insurance share shrinks as a percentage at higher salaries.
This figure assumes an employee under 40, so nursing care insurance (介護保険) isn't included. If you're aged 40-64, an additional ~0.8% employee premium applies on top of the figures shown here: use the full calculator above and toggle the age switch to see your exact number.
Japan take-home figures use 2026 National Tax Agency income tax brackets, the 2.1% reconstruction surtax, resident tax at its steady-state ~10% rate, and Tokyo Kyokai Kenpo employee social insurance rates as a representative default. Actual health insurance rates vary slightly by prefecture and health insurance union, and resident tax is billed on the prior year's income in practice. Always confirm with your employer's payroll team or a Japan tax professional for your exact figures.