If you are a foreign resident preparing to leave Japan, understanding what happens to your tax identification number when leaving Japan is one of those practical tasks that is easy to overlook in the middle of packing and paperwork. The good news is that the process is manageable once you know the steps. This guide walks you through what you need to do, what documents are involved, and what tax obligations may follow you even after you board that flight.
What Is Japan's Tax Identification Number System?
Japan uses the Individual Number system, commonly known as My Number. Every resident registered in Japan — Japanese citizens and foreign residents alike — is assigned a 12-digit Individual Number. This number is used for tax filings, social insurance records, and certain financial transactions.
Your My Number does not disappear the moment you leave Japan. Understanding what happens to it — and to your tax record — is important so you do not face unexpected bills or penalties later.
What Happens to Your My Number When You Leave Japan?
When you deregister your address at your local municipal office (shi/ku/cho/son office) before departure, your residence registration is cancelled. At that point, you are no longer treated as a tax resident of Japan for the current year from the date of departure.
However, your My Number itself is not deleted. It remains on record with the Japanese authorities. If you return to Japan and re-register a residential address in the future, the same number is reactivated.
Key Tax Steps Before You Leave Japan
There are several important steps to take in the weeks before your departure. Think of this as a checklist to work through methodically.
1. Deregister Your Address
Visit your local municipal office and submit a Tenshutsu届 (転出届) — a moving-out notification. You can usually do this up to 14 days before your departure date. Bring your Residence Card and your My Number card or notification letter. This step triggers the official record of your departure.
2. Appoint a Tax Agent (Nozei Kanrinin)
If you have ongoing tax matters in Japan — such as rental income, investments, or a final tax return to file — you are legally required to appoint a tax agent (nozei kanrinin) before you leave. This is someone based in Japan (a trusted friend, family member, accountant, or tax professional) who can handle correspondence and filings on your behalf. You submit the appointment form to your local tax office (zeimusho). If you do not appoint one, you must settle all outstanding tax matters yourself before departure.
3. File a Final Tax Return if Necessary
If you earned income in Japan during the current tax year, you may need to file a final income tax return (kakutei shinkoku). The standard filing period runs from mid-February to mid-March for the previous year's income, but if you are leaving Japan mid-year, you can file early at your local tax office before you go. Confirm the latest schedule and requirements directly with the National Tax Agency (NTA) website, as deadlines and procedures can change.
4. Settle Resident Tax (Inhabitant Tax)
Resident tax (juuminzei) is billed based on your income from the previous year and is assessed as of 1 January. Even if you leave Japan in, say, April, you may still owe resident tax for that year. This is collected by your municipality, not the national government. You can either pay it before you leave or have your appointed tax agent handle installment payments. Do not ignore these bills — unpaid resident tax can cause complications if you return to Japan.
5. Close or Manage Your Japanese Bank Account
Japanese banks such as Japan Post Bank (Yucho) generally require account holders to have a registered address in Japan. Once you deregister, your account may be restricted. Consider whether to close the account before leaving or transfer remaining funds. Services like Wise or Remitly can help you move money internationally before you go — always compare fees and exchange rates on their official sites, as these change frequently.
What Tax Obligations May Continue After Leaving?
Leaving Japan does not automatically erase all tax obligations. Here is a quick overview of situations where you may still have responsibilities:
- Japanese-source income: If you continue to earn income from Japan (rent from a property, dividends, or business payments), that income is generally subject to Japanese withholding tax even as a non-resident.
- Unpaid taxes: Any outstanding income tax or resident tax remains due regardless of where you live.
- Tax treaties: Japan has tax treaties with many countries to prevent double taxation. Check whether a treaty exists between Japan and your destination country — your home country's tax authority or a qualified tax professional can advise on this.
Documents to Gather Before You Leave
| Document | Why You Need It |
|---|---|
| My Number card or notification letter | Required for address deregistration and tax filings |
| Residence Card | Needed at the municipal office and at departure |
| Past tax return copies | Useful reference for future filings or overseas tax declarations |
| Tax agent appointment form | Submit to your local tax office if you have ongoing tax matters |
| Resident tax payment records | Proof of payment in case of future queries |
This table is a general guide. Always confirm the latest requirements with your municipal office and the National Tax Agency.
Where to Get Official Help
The National Tax Agency (NTA) website (nta.go.jp) provides official guidance and downloadable forms in Japanese. Many tax offices also have English-speaking consultation services or can arrange an interpreter — it is worth calling ahead to check. The Japan External Trade Organization (JETRO) and local international centres in major cities sometimes offer free advisory sessions for foreign residents.
Summary: Your Tax ID Checklist for Leaving Japan
Dealing with tax administration while preparing to move abroad feels like a lot, but breaking it into clear steps makes it entirely doable. Here is a quick recap of what to focus on:
- Submit your moving-out notification (tenshutsu届) at your municipal office before departure.
- Appoint a tax agent if you have any unresolved Japanese tax matters.
- File an early final tax return if you have earned income in Japan this year.
- Check and settle any outstanding resident tax with your municipality.
- Manage your Japanese bank accounts and transfer funds if needed.
- Keep copies of all tax documents — you may need them in your new country.
Your My Number stays on record in Japan, and some tax obligations can follow you across borders — but none of this is insurmountable with a bit of preparation. Take it one step at a time, confirm the latest rules directly with the NTA or your local tax office, and you will be in a solid position to close this chapter of your Japan life cleanly and confidently.