Tax Filing Guide for Foreigners in Japan (2026)

Your complete step-by-step guide to filing taxes in Japan as a foreigner in 2026.

Tax season in Japan can feel overwhelming, especially if you’re navigating it for the first time as a foreigner. The annual tax return process — known as kakutei shinkoku (確定申告) — runs from February 16 to March 15, 2026, and understanding whether you need to file, what documents to prepare, and how to actually submit your return can save you significant stress and money.

This guide covers everything you need to know: who must file, key deadlines, required documents, filing methods, tax brackets, deductions available to foreigners, and what to do if you’re leaving Japan. Whether you’re an English teacher, an IT engineer, a freelancer, or a business owner, this article will walk you through the process.

1. Do You Need to File a Tax Return?

Not everyone living in Japan needs to file a tax return. If you’re a regular employee at a single company, your employer typically handles everything through year-end adjustment (nenmatsu chosei / 年末調整). However, there are many situations where foreigners must or should file.

You Must File If:

You Should File (Even If Not Required) If:

• You had high medical expenses (over 100,000 yen) and want the deduction
• You support dependents overseas (parents, spouse, children) and want the dependent deduction
• You made furusato nozei (hometown tax) donations to more than 5 municipalities
• You left a job mid-year and your taxes were over-withheld
• You want to claim housing loan deductions for the first time

2. Key Dates and Deadlines for 2026

Timing is critical for tax filing in Japan. Missing the deadline can result in penalties and additional taxes.

Late Filing Penalties

3. Documents You’ll Need

Gathering the right documents before you start is essential. Missing even one item can delay your filing. Here is a complete checklist organized by category.

Identity Documents

• My Number Card (マイナンバーカード) — Required for e-Tax online filing. If you don’t have the card, you’ll need your My Number notification card plus a photo ID (residence card/passport).
• Residence Card (在留カード) — As a backup form of identification
• Passport — Needed if claiming overseas dependent deductions

Income Documents

• Withholding tax slip (源泉徴収票 / gensen chosuhyo) — Issued by each employer. This is your most important income document.
• Payment records for freelance/business income — Invoices, bank statements, payment confirmations
• Income from overseas — Statements from foreign banks, investment accounts, rental properties

Deduction Documents

• Social insurance payment certificates (社会保険料控除証明書) — National Health Insurance, National Pension
• Life insurance deduction certificates (生命保険料控除証明書)
• Medical expense receipts — For the medical expense deduction (keep all receipts from hospitals, pharmacies, and clinics)
• Furusato nozei donation receipts — Certificates from each municipality
• Remittance records for overseas dependents — Bank transfer receipts proving you sent money to dependents abroad
• Proof of family relationship for overseas dependents — Birth certificates, marriage certificates (with Japanese translations)

Payment Information

• Bank account details — For receiving your refund (Japanese bank account required)
• Business expense receipts — If self-employed, organized by category (travel, supplies, equipment, etc.)

4. Step-by-Step: How to File Your Tax Return

There are three main ways to file your tax return in Japan. Each has its own advantages depending on your situation, language ability, and comfort level.

Method 1: Paper Filing at the Tax Office

Visit your local tax office (zeimusho / 税務署) in person during the filing period. Many tax offices set up special assistance counters during February and March.

1. Find your jurisdictional tax office based on your registered address (search at nta.go.jp)
2. Bring all required documents (see checklist above)
3. Arrive early — lines can be very long, especially in the final week
4. Staff will help you fill out the forms (limited English support available at some offices)
5. Submit your completed return and receive a stamp confirming receipt

Method 2: e-Tax Online Filing

Japan’s National Tax Agency provides an online filing system called e-Tax. This is the most convenient method if you have the right setup.

1. Go to the Kakutei Shinkoku Shinkoku-sho Sakusei Corner on the NTA website
2. Choose “My Number Card method” (requires a My Number Card + card reader or compatible smartphone)
3. Log in using your My Number Card via the Mynaportal app
4. Enter your income details from your gensen chosuhyo
5. Enter deduction details (medical expenses, insurance, dependents, etc.)
6. Review the auto-calculated tax amount
7. Submit electronically and save the confirmation PDF

Method 3: Hire a Tax Accountant (Zeirishi)

A licensed tax accountant (zeirishi / 税理士) can handle the entire process for you — from gathering information to filing and even communicating with the tax office on your behalf.

1. Find a bilingual tax accountant who understands foreigner-specific issues
2. Share your documents (gensen chosuhyo, receipts, etc.)
3. The accountant prepares and reviews your return
4. They file on your behalf via e-Tax
5. You receive a summary of what was filed and any taxes owed or refund expected

Comparison of Filing Methods

5. Understanding Your Tax Brackets

Japan uses a progressive income tax system, meaning higher portions of your income are taxed at higher rates. Understanding where you fall can help you estimate your tax liability.

National Income Tax Rates (2025 Income)

“Taxable income” is your gross income minus all applicable deductions (employment income deduction, personal exemption, social insurance, etc.). It is typically much lower than your total salary.

Reconstruction Special Income Tax

Since 2013 (and continuing through 2037), there is an additional 2.1% surtax applied to your income tax amount. This funds reconstruction efforts following the 2011 Great East Japan Earthquake. This is automatically calculated on your return.

Example Calculation

Suppose your taxable income is 5,000,000 yen:

1. Falls in the 20% bracket: 5,000,000 x 20% = 1,000,000 yen
2. Minus the deduction amount: 1,000,000 – 427,500 = 572,500 yen (income tax)
3. Reconstruction surtax: 572,500 x 2.1% = ~12,022 yen
4. Total national tax: approximately 584,522 yen
5. Plus resident tax: approximately 500,000 yen (billed separately)

6. Common Deductions Foreigners Can Claim

Deductions reduce your taxable income, which directly lowers your tax bill. Many foreigners miss out on significant deductions simply because they don’t know about them. Here are the most relevant ones.

Overseas Dependent Deduction (国外扶養控除)

This is one of the most valuable deductions for foreigners in Japan. If you financially support family members living abroad — parents, a spouse, or children — you may claim a dependent deduction for each qualifying individual.

Requirements for overseas dependents:

• The dependent’s annual income must be under 480,000 yen
• You must provide proof of family relationship (birth/marriage certificates with Japanese translation)
• You must provide proof of remittance — bank transfer records showing you sent money to each dependent (minimum 380,000 yen per dependent per year, as of recent rule changes)

Social Insurance Deduction (社会保険料控除)

All social insurance premiums you paid during 2025 are fully deductible:

• National Health Insurance (国民健康保険)
• National Pension (国民年金) — approximately 200,000 yen/year
• Employee health insurance and pension — already handled if deducted from salary

If you’re self-employed and paid National Pension and National Health Insurance yourself, these deductions can be significant.

Medical Expense Deduction (医療費控除)

If your total out-of-pocket medical expenses for the year exceeded 100,000 yen (or 5% of your income if your income is under 2 million yen), you can deduct the excess amount up to a maximum of 2 million yen.

Qualifying expenses include:

• Hospital and clinic visits
• Prescription medication
• Dental treatment (including some orthodontics)
• Transportation costs to medical facilities
• Childbirth costs (minus any insurance payouts)

Furusato Nozei (ふるさと納税 / Hometown Tax Donations)

Furusato nozei lets you make tax-deductible donations to local governments in exchange for regional gifts. While it doesn’t reduce your total tax burden significantly (the net effect is similar to a 2,000 yen self-pay), it lets you redirect where your taxes go and receive products in return.

• If you donated to 5 or fewer municipalities, you can use the simplified “One-Stop” system (no tax return needed)
• If you donated to 6 or more, or if you’re filing a tax return anyway, you must claim it on your return

Other Deductions Worth Knowing

7. Filing If You’re Leaving Japan

If you’re planning to leave Japan permanently (or for an extended period), you have special filing obligations. This is an area where many foreigners make costly mistakes.

Before You Leave: Departure Tax Return (準確定申告)

You must file a tax return for the portion of the year you earned income in Japan. This is called a departure tax return (junin kakutei shinkoku).

1. Determine your departure date and calculate income earned from January 1 to that date
2. Request your gensen chosuhyo early from your employer (they may need extra time to prepare a mid-year slip)
3. File your return before you leave — you can submit it at the tax office or via e-Tax
4. Pay any taxes owed before departure

Appointing a Tax Representative (納税管理人)

If you cannot complete your filing before leaving Japan, you must appoint a tax representative (nozei kanrinin / 納税管理人) — a person who remains in Japan and handles tax matters on your behalf.

• This can be a friend, colleague, or (recommended) a tax accountant
• Submit the Tax Representative Notification (納税管理人届出書) to your tax office before leaving
• Your representative can file your return and handle any communications from the tax office

The June 30 Rule: Resident Tax

Resident tax for the year is determined based on your address as of January 1. If you were living in Japan on January 1, 2026, you owe resident tax for the full 2025 fiscal year.

Pension Lump-Sum Withdrawal (脱退一時金)

Foreigners who have paid into the Japanese pension system for at least 6 months (but less than 10 years) can claim a lump-sum withdrawal payment after leaving Japan. Note that a 20.42% tax is withheld from this payment, but you can file for a partial refund through your tax representative.

8. When to Hire a Tax Professional

While simple tax returns can be handled on your own, there are situations where hiring a professional tax accountant (zeirishi) isn’t just convenient — it can save you money and prevent serious problems.

You Should Strongly Consider a Tax Accountant If:

• You’re a freelancer or business owner — Proper expense categorization and blue return filing can significantly reduce your tax bill
• You have income from outside Japan — Foreign income reporting has complex rules around tax treaties and foreign tax credits
• You’re claiming overseas dependents — A professional ensures your documentation meets current requirements
• You’re leaving Japan — Departure tax returns and representative appointments are technical processes
• You received stock options or equity compensation — These have unique tax treatment in Japan
• You don’t read Japanese well enough for e-Tax — A bilingual accountant removes the language barrier entirely
• You want peace of mind — Errors on tax returns can lead to audits, penalties, and years of back-and-forth with the tax office

What Does a Tax Accountant Cost?

DIY vs. Professional: When Is It Worth It?

As a general rule: if your tax situation involves only one employer, no side income, and no special deductions, you can likely handle it yourself. But the moment your situation involves any complexity — multiple income sources, overseas factors, business income, or deductions you’re unsure about — a professional’s fee will likely pay for itself through tax savings and avoided penalties.

9. Frequently Asked Questions

Can I file in English?

Unfortunately, Japanese tax forms and the e-Tax system are primarily in Japanese. The NTA provides some multilingual guides, but the actual filing must be done in Japanese. This is one of the main reasons foreigners choose to work with a bilingual tax accountant.

What happens if I don’t file?

If you were required to file and didn’t, the tax office may issue a determination notice (決定) estimating your tax liability — often without favorable deductions applied. You’ll also face the late filing surcharge and delinquency tax discussed earlier.

Can I file after the deadline?

Yes. Late filing is always better than not filing at all. If you’re filing for a refund (not owing taxes), you actually have 5 years from the end of the tax year to file. For example, you can file for 2025 income as late as December 31, 2030, if you’re only claiming a refund.

I just arrived in Japan. Do I need to file?

If you arrived partway through 2025 and earned income in Japan, you may need to file depending on your employment situation. If your employer performed year-end adjustment, you’re likely covered. If not, you should file for the period you worked in Japan.

What about cryptocurrency and investment income?

Cryptocurrency gains are classified as miscellaneous income (雑所得) in Japan and are taxed at your marginal income tax rate (not a flat capital gains rate). If your crypto gains plus other miscellaneous income exceed 200,000 yen, you must file. Stock trading profits may also need to be reported depending on your account type. Consult a tax professional for these situations.

This article is for informational purposes only and does not constitute tax advice. For personalized guidance, consult a qualified tax professional (zeirishi). Tax laws and rates are subject to change — always verify current regulations with the National Tax Agency or a licensed advisor.