How tax filing differs for foreigners in Japan — residency, overseas dependents and tax treaties
If you are a foreign national working or studying in Japan, you have probably wondered: "Is the kakutei shinkoku (final tax return) or year-end adjustment the same for me as for Japanese workers?" The answer is: basically the same — but special rules apply on exactly three points. (1) Whether you count as a resident or a non-resident, (2) the strict documentation required to claim dependents living outside Japan, and (3) tax treaty exemptions that apply to international students and others. This article walks through the three gates in order, with the common pitfalls and where to check.
· A foreign national who lives and works in Japan for a year or more is a "resident" — the same tax rules as Japanese nationals. Nationality is irrelevant.
· The dependent deduction for family living outside Japan is all about documents. For relatives aged 30-69 you generally need proof of remittances of ¥380,000 or more per year.
· Part-time income of international students can be tax-exempt under a tax treaty in some countries (China, for example) — but only if a notification is filed in advance.
· In the year you leave Japan, remember to either appoint a tax agent or file before departure.
Gate 1: Resident or non-resident — decided by where you live, not your nationality
Japanese income tax does not distinguish by nationality. The test is whether your domicile (base of life) is in Japan, or you have had a place of residence in Japan for one year or more[NTA No.2012].
| Category | Typical examples | Income subject to tax |
|---|---|---|
| Resident (other than non-permanent resident) | Foreign nationals living and working long-term in Japan | Worldwide income |
| Non-permanent resident (a resident without Japanese nationality whose domicile in Japan totals 5 years or less within the past 10 years) | Expat employees and engineers within about 5 years of arrival | Japan-source income, plus foreign income remitted to Japan, etc. |
| Non-resident | Short-term business travelers; after leaving Japan | Japan-source income only (salary generally withheld at a flat 20.42%) |
If you are a salaried resident, the rules on when a year-end adjustment or a final tax return is required are exactly the same as for Japanese employees. With salary from a single employer and annual pay of ¥20 million or less, year-end adjustment usually completes your taxes; you file a return if you have side income over ¥200,000, a medical expense deduction, furusato nozei donations (other than the one-stop system) and so on. See the final tax return checklist for the basic flow. If overseas assets or inheritance are involved, see also our article on foreigners and Japanese inheritance tax.
Gate 2: Dependents living outside Japan — remittance records are everything
If you send money to family in your home country and want the dependent deduction, the special rules for dependents living outside Japan apply. A verbal claim or a name on the form is not enough — the following documents are mandatory[NTA: overseas dependents].
- Relationship documents — copies of a family register, birth certificate, passport, etc. (attach a Japanese translation if in a foreign language)
- Remittance documents — bank foreign-remittance slips, family-card statements or similar showing money sent from you to that relative. Required for each relative individually (one lump transfer to the head of the household does not cover everyone)
The rules were tightened from 2023: a dependent living outside Japan who is aged 30 or over and under 70 qualifies only if they are (1) a student studying abroad, (2) a person with a disability, or (3) received a total of ¥380,000 or more from you that year. For the typical case — supporting parents in their 40s to 60s back home — the ¥380,000-plus remittance and its supporting documents are effectively mandatory. Details, such as family credit-card use also counting, are covered in the NTA's Q&A.
These documents are required for both year-end adjustment and the final tax return. If they are missing, a later tax audit can deny the deduction and bill you for back taxes — so keep the year's records together, and expect your employer's payroll staff to ask for them every year at year-end adjustment time.
Gate 3: Tax treaty exemptions for student part-time work — never automatic
Japan has tax treaties with many countries, and students from some countries pay no income tax on part-time earnings used for living and education expenses. The best-known example is students from China: under the Japan-China tax treaty, payments for their maintenance and education are exempt[NTA No.2884].
- To receive the exemption, a notification form concerning the tax treaty must be submitted to the tax office through your employer in advance. Without it, tax is withheld as usual.
- Treaty terms differ by country. For Korea, Vietnam and many others the scope and conditions differ (or there is no exemption at all), so never generalize that "students are exempt".
- Part-time work not covered by an exemption is treated the same as for Japanese students, and from tax year 2026 the working-student deduction covers salary income up to ¥1.63 million. How this interacts with a parent's dependent claim is explained in our article on student part-time work and dependents (if your parents live outside Japan, the remittance rules above also come into play).
The year you leave Japan — file before departure, or appoint a tax agent
If you leave Japan mid-year and become a non-resident, that year's income must be settled. There are two ways[NTA No.1923].
- Finish your filing before departure — for a company employee with no other income, the employer's year-end adjustment at departure often completes everything.
- Appoint a tax agent — if rental income continues after you leave, or resident tax remains payable the following year, choose an agent in Japan (nozei kanrinin) and notify the tax office before departure.
Resident tax is levied for the full year on your previous year's income if you had an address in Japan on January 1. Even if you leave on January 2 or later, that year's resident tax is due in full. When planning your departure, confirm with your employer not only income tax but also how the resident tax will be paid (lump-sum withholding from final pay, or via a tax agent) to avoid trouble.
What to do today
- Check whether you (or your employee) are a resident, non-permanent resident or non-resident, based on length of stay and address
- If you claim dependents living outside Japan, check that this year's remittance records (per relative, the ¥380,000 rule) are complete
- If you employ international students, check whether the tax treaty notification forms have been submitted
Frequently asked questions
Do foreigners file a tax return in Japan the same way as Japanese nationals?
If you live and work in Japan as a "resident", the rules are the same regardless of nationality. As with Japanese workers, no return is needed if year-end adjustment on a single salary settles everything. Differences arise in three situations: the dependent deduction for family living outside Japan, tax treaty exemptions, and settling tax in the year you leave Japan.
Can I claim the dependent deduction for parents I send money to in my home country?
For relatives aged 30 or over and under 70, unless they are students studying abroad or persons with disabilities, you must remit a total of ¥380,000 or more to them that year and submit relationship documents and remittance documents (for each relative individually). Without the documents the deduction is denied in both year-end adjustment and the final tax return.
I heard Chinese students pay no tax on part-time jobs in Japan. Is that true?
Under the Japan-China tax treaty, part-time income for maintenance and education is exempt from income tax. However, this applies only if a notification form concerning the tax treaty has been submitted to the tax office through the employer; without it, tax is withheld as usual. Whether an exemption exists, and its scope, differs by country.
Sources
Based on the following National Tax Agency materials. Individual determinations depend on circumstances; check the latest information before filing.
- National Tax Agency No.2012: Determining residents and non-residents
- National Tax Agency: Application of dependent deductions for relatives living outside Japan
- National Tax Agency No.2884: Withholding and tax treaties
- National Tax Agency No.1923: Working overseas and final tax returns
*This article is general information, not individual tax advice. Residency status, treaty application and dependent eligibility depend on individual circumstances; consult the tax office or a licensed tax accountant for specific decisions. A basic guide in English is also available on our page for foreign residents.
