Compare taxes and see how much you save moving from Japan to UK
Japan hosts one of the largest British expat communities in Asia — an estimated 15,000–20,000 UK nationals live in Japan, primarily in Tokyo, with smaller communities in Osaka and Kyoto. The Japan-UK Double Taxation Agreement coordinates tax obligations between the two countries. Japan's income tax structure is complex: a national income tax (5–45%), a fixed 10% local inhabitant tax (jūminzei) on the prior year's income, and substantial social insurance premiums (kokumin kenkō hoken for health and kōsei nenkin for pension). The combined income + local tax can reach 55% for top earners — higher than the UK's top rate. However, Japan's social insurance premiums are partly embedded in compensation and partly employer-funded, meaning the marginal burden on employee income is somewhat lower than the headline suggests. Japan's tax-free threshold is much lower than the UK's personal allowance (£12,570) — Japan's basic deduction is approximately ¥480,000 (~£2,500). UK personal allowance (£12,570) provides a genuine zero-rate band. Japan has no capital gains tax on interest from domestic government bonds and specific other instruments (though foreign stocks and domestic equities are subject to a flat 20.315% tax). UK has a CGT annual exempt amount (£3,000 from April 2024) with 10–24% rates depending on asset type. Both countries have extensive social security systems. The Japan-UK DTA prevents double taxation with Foreign Tax Credit mechanisms and residence-based allocation rules.
National + Local Income Tax + Social Insurance
National income tax 5–45%; 10% fixed local inhabitant tax on prior year income; social insurance premiums health + pension ~28% employee+employer; worldwide income taxed for Japan residents
Income Tax + National Insurance, Personal Allowance £12,570
Income tax 20–45%; National Insurance Class 1 up to 8%; personal allowance £12,570; no local income tax; worldwide income taxed for UK residents
At ¥8,000,000 / £42,000 income:
At ¥8M income (~£42K), Japan national tax approximately ¥900,000 (~11%) plus local inhabitant tax ¥800,000 (10%) = effective ~21% before social insurance. UK at £42K: approximately £5,886 income tax + £2,048 NI = approximately 19%. Broadly comparable at mid-range income. Japan becomes significantly higher above ¥30M (~£160K) when top rates combine. DTA prevents double taxation.
| Income | JP Tax | GB Tax | Savings | 10-Year |
|---|---|---|---|---|
| ¥5M / £26,000 | ~¥400,000 Japan national + ¥500,000 local (18%) | ~£2,686 UK income tax + £1,200 NI (15%) | Comparable at low-to-mid income; Japan slightly higher | Tokyo cost of living comparable to London |
| ¥8M / £42,000 | ~¥900,000 national + ¥800,000 local (21%) | ~£5,886 income tax + £2,048 NI (19%) | Very similar effective burden at this level | Lifestyle factors drive Japan vs UK decision |
| ¥15M / £80,000 | ~¥2,400,000 national + ¥1,500,000 local (26%) | ~£21,432 UK income tax + £3,100 NI (31%) | UK higher effective rate at this level | Both countries with high social costs |
| ¥30M / £160,000 | ~¥8,000,000 Japan combined (27%+) | ~£56,432 UK (35% effective) | Japan and UK converge at high income | DTA prevents double taxation |
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Manage International Payments →Japan's local inhabitant tax (jūminzei) is a flat 10% of the prior year's taxable income, levied by the municipality (city, town, or ward) where you lived on January 1st of the current year. It is assessed on the previous year's income — meaning you pay no inhabitant tax in your first year in Japan (creating a hidden cash-flow benefit), but face a double tax burden in your last year if you leave mid-year. The 10% is fixed regardless of income level (no progressivity) — effectively a flat tax on top of the progressive national income tax. For a Japanese resident earning ¥8M, the national tax might be 11% and the local tax adds another 10% — for a combined 21% before social insurance premiums.
Both countries have compulsory social insurance. Japan: health insurance (kokumin kenkō hoken or shakai hoken) approximately 10% of salary split employer/employee; pension insurance (kōsei nenkin) approximately 18.3% split; employment insurance 1.2%. Employee total is approximately 14–15% of salary. UK: National Insurance Class 1 employee: 8% on earnings £12,570–£50,270; 2% above £50,270. Employer NI: 13.8% above £9,100. For a £42,000 (¥8M) earner: UK employee NI approximately £2,048 (4.9% effective); Japan employee social insurance approximately ¥600,000–¥700,000 (~8%). Japan's total social insurance burden on employees is higher than the UK's NI at equivalent incomes.
Yes — Japan and the UK have a Double Taxation Convention. Key provisions: employment income is taxed in the country where work is performed; business profits in the country of operation; dividends subject to 10% withholding at source (reduced from 20% Japan domestic rate); interest at 10% withholding; royalties at 0%. Pension income is generally taxed in the country of residence for private pensions; UK state pension paid to Japan residents may remain taxable in the UK under the treaty. Foreign Tax Credit mechanisms allow taxes paid to one country to be credited against the other's obligations. British expats in Japan who remain UK domiciled should carefully manage their UK tax residency status.
UK citizens can enter Japan visa-free for up to 90 days as tourists. For longer stays and employment: Work Visa — tied to a specific job category (engineer/specialist in humanities, intracompany transferee, highly skilled professional, etc.); sponsored by a Japanese employer. The Highly Skilled Professional visa uses a points system — professionals with sufficient points (age, academic background, salary, Japanese language skills) qualify for expedited permanent residency (1 year instead of 10). Spouse/dependent visa: for partners of Japanese citizens or permanent residents. Investor/Business Manager visa: for those investing ¥5M+ and running a Japanese business. After 10 years of continuous legal residence (or 1–5 years for highly skilled workers), permanent residency is available. Naturalisation is possible after 5 years of residence.
Tokyo has by far the largest British community in Japan — estimated 10,000–15,000 UK nationals in the Tokyo metropolitan area. Key districts for expats: Minato-ku (Hiroo, Azabu, Roppongi) has the highest concentration of foreign professionals — the British Embassy is in Ichigaya, and Hiroo has an established international schools and expat services cluster. Shinjuku and Shibuya are popular with younger British residents. Kobe has a historic British community dating to the Meiji era (Kobe British community has been present since the 1850s). Osaka has a smaller but active British professional community. Kyoto attracts British academics, teachers, and those in the arts and culture sector. Japan's expat infrastructure in Tokyo is well-developed — British-style pubs, English-language services, and international schools are readily available.