If you’re living in Japan, tax season can feel overwhelming — especially when everything is in Japanese and the rules seem designed for people who’ve lived here their whole lives. But filing taxes in Japan as a foreigner is more manageable than it looks once you understand how the system works. Whether you’re a full-time employee, a freelancer, or earning income from multiple sources, this guide walks you through exactly what you need to do and when.
Who Needs to File Taxes in Japan?
Not every foreigner in Japan needs to file a tax return. If you’re a company employee (salaryman) with a single employer, your company handles your year-end tax adjustment — called nenmatsu chosei (年末調整) — automatically. In that case, you may not need to file anything at all.
However, you must file a tax return (確定申告 / kakutei shinkoku) if any of the following apply to you:
– You are self-employed or a freelancer
– You earn income from two or more employers
– Your annual income from a secondary job exceeds ¥200,000
– You earned more than ¥20 million in salary income
– You want to claim deductions (medical expenses, home loan, donations via furusato nozei)
For example, if you teach English at a language school full-time but also do private tutoring on the side and earn ¥300,000 per year from it, you are required to file.
Key Dates and Deadlines You Can’t Miss
The Japanese tax year runs from January 1 to December 31. The filing period for income tax (所得税 / shotoku zei) opens on February 16 and closes on March 15. Missing this deadline can result in late penalties and interest charges, so mark it on your calendar now.
If you are expecting a tax refund — which is common if you’ve overpaid through salary deductions — you can actually file as early as January 1. Filing early means getting your refund faster, sometimes within a few weeks.
Residence tax (住民税 / jumin zei) is a separate payment billed by your local ward office, usually starting in June. This is calculated based on your previous year’s income, so expect a bill even after you’ve filed your national income tax return.
How to Actually File: Step-by-Step
The most foreigner-friendly way to file is through the National Tax Agency’s (NTA) online system called e-Tax. You can access it at nta.go.jp and use the “Kakutei Shinkoku” creation tool, which is partially available in English. You’ll need your My Number (個人番号) card and a compatible IC card reader or the My Number Card smartphone app to log in.
Here’s a simple overview of the process:
1. Gather your documents: Gensen choshu hyo (源泉徴収票 / withholding tax slip from your employer), receipts for deductible expenses, your My Number card, and your bank account details for any refund
2. Go to nta.go.jp and open the tax return filing tool
3. Enter your income and deductions following the on-screen prompts
4. Submit online via e-Tax or print and mail/deliver to your local tax office (税務署 / zeimusho)
If you prefer in-person help, visit your nearest zeimusho between February and March. Staff can assist with basic questions, and some offices in major cities like Tokyo, Osaka, and Nagoya have English-speaking support or multilingual handouts available.
Common Mistakes Foreigners Make
One of the biggest mistakes is assuming your company handled everything. If you had any outside income or freelance work, it’s your responsibility to file — your employer has no visibility into that income.
Another common error is forgetting to declare overseas income. If you are classified as a permanent resident or a non-permanent resident who has lived in Japan for more than five years, you may be required to report worldwide income. Always check your residency tax status carefully.
Finally, many foreigners miss out on legitimate deductions they’re entitled to. Medical expenses over ¥100,000, donations via furusato nozei (ふるさと納税), and earthquake insurance premiums are all deductible. Don’t leave money on the table.
FAQ
Do I need to file taxes if I only worked in Japan for part of the year?
Yes, in most cases. If you earned income in Japan during any part of the tax year, you are generally required to file. Your tax liability will be prorated based on the period you were a resident. If you left Japan permanently, you may need to appoint a tax agent (納税管理人) to file on your behalf after departure.
Can I file in English?
The e-Tax system and official forms are primarily in Japanese, but the NTA website offers some English guidance materials. For full English support, consider hiring a bilingual tax accountant (税理士 / zeirishi). Fees typically start around ¥30,000–¥50,000 for a basic return.
What happens if I don’t file?
If you’re required to file and don’t, you risk a late filing penalty (無申告加算税) of 15–20% of the unpaid tax, plus daily interest. The NTA does cross-check residence records and employer data, so non-filing is not a risk worth taking.
Conclusion
Filing taxes in Japan as a foreigner isn’t as scary as it first seems — it just requires knowing the rules and staying organized. Start gathering your documents in January, use the NTA’s online tool at nta.go.jp, and don’t hesitate to visit your local zeimusho for help.
If your tax situation is complicated — multiple income sources, overseas assets, or you’re unsure of your residency status — hire a bilingual zeirishi. The peace of mind is worth every yen. Check Japan Navigator’s recommended resources page for trusted English-speaking tax professionals in Japan.
