Name Change Procedures in Japan for Foreigners

Changing your name while living in Japan as a foreigner can seem daunting, but the process is well-defined once you understand which pathway applies to your situation. Whether you recently got married, divorced, changed your name legally in your home country, or want to register a Japanese alias for daily use, this guide walks you through every option available to foreign residents in Japan.

Japan's name change system for foreigners operates differently from many Western countries. Rather than a single court-based process, multiple avenues exist depending on your citizenship status, your reason for the name change, and how you intend to use the new name. Understanding the distinctions between a legal name change, a registered alias (tsushomei), and immigration notifications is essential before you begin.

Understanding Your Name Change Options in Japan

Foreign residents in Japan have three main pathways for name-related changes. Each serves a different purpose and involves different government offices.

Option 1: Updating Your Registered Name After a Legal Change Abroad If your name has changed legally in your home country — through marriage, divorce, court order, or local civil registration — you are required to notify Japanese immigration authorities and update your residence card. This is the most common scenario for expats.

Option 2: Registering a Japanese Common Name (Tsushomei / 通称名) If you want to use a Japanese name for daily life without changing your legal name or citizenship, you can register a "common name" (通称名, tsushomei) at your local municipal office. This registered alias holds legal weight in Japan and can be used on business cards, bank accounts, utility contracts, and many official documents.

Option 3: Changing Your Name Through Naturalization If you wish to fully adopt a Japanese name legally, naturalization is the ultimate pathway. After obtaining Japanese citizenship, you can officially register a Japanese name. However, Japan prohibits dual nationality, so this path requires relinquishing your original citizenship.

For comprehensive guidance on Japanese official paperwork as a foreigner, see Living in Nihon's Japanese Paperwork & Documents Navigation Guide.

How to Update Your Name on Your Residence Card

If your name has changed legally — most commonly due to marriage or divorce — you must notify the Immigration Services Agency (入国管理局) within 14 days of the change occurring. Failure to report within this window can complicate your residency status and may affect future applications, including permanent residency.

Step-by-Step Process

1. Obtain updated official documents from your home country — These must reflect your new legal name. A new passport in your new name is the most reliable document.
2. Prepare supporting documents — Depending on the reason for the change, gather a marriage certificate, divorce certificate, or court order. If these documents are not in Japanese, you will need a certified Japanese translation.
3. Visit your nearest Immigration Services Agency branch — Bring all required documents. In some cases, same-day processing is possible; other offices may require a follow-up visit.
4. Receive your updated residence card — Your new name will be reflected on a reissued residence card.

Who Can File the Notification

For detailed guidance on residence card management, visit For Work in Japan for immigration and employment resources for foreigners.

Registering a Japanese Common Name (Tsushomei)

The tsushomei system is one of Japan's most practical — and underutilized — tools for foreign residents. It allows you to register a Japanese name as a legal alias without changing your citizenship, going through a court process, or modifying your official home country documents.

What Is Tsushomei?

Tsushomei (通称名) literally means "commonly used name." In Japan's legal framework, this registered alias functions similarly to a DBA ("doing business as") designation for individuals. Once registered at your municipal office (市役所, shiyakusho), you can use this name on:

• Bank account documents
• Utility contracts
• Business cards and company registrations
• Many government forms
• Driver's license (in some municipalities)

How to Register a Tsushomei

1. Visit your local city hall or ward office (市役所 / 区役所)
2. Bring your residence card and passport
3. Provide evidence that you regularly use the name — This may include business cards, correspondence, or a statement explaining how you use the name
4. Submit the registration form — Processing is typically same-day

Note: Not all municipalities handle tsushomei registration identically, and some may ask for additional documentation or justification. It is advisable to call ahead and confirm requirements with your specific city hall.

Limitations of Tsushomei

While widely recognized, tsushomei is not accepted everywhere. Your legal passport name remains your official legal identity. For matters such as passport applications, international contracts, and some financial institutions, your legal name in your home country takes precedence.

For more resources on living and working in Japan, explore Ittenshoku's career and living guides.

Name Change After Marriage in Japan

Marriage is the most common reason foreigners need to update their name records in Japan. The procedures differ depending on whether you marry a Japanese national or another foreigner, and whether you plan to change your name in your home country or only register an alias in Japan.

Married to a Japanese National

When a foreigner marries a Japanese national in Japan, the marriage is registered at the local municipal office. However, unlike Japanese nationals who automatically adopt the family register (koseki) system, foreigners remain on the Juki-net (住基ネット) foreigner registry.

• You are not legally required to change your surname upon marriage in Japan
• You may register your spouse's Japanese surname as your tsushomei
• If your home country permits name changes based on foreign marriages, you can pursue the change there and then update your Japanese records

Married to Another Foreigner

If both spouses are foreign nationals, the marriage registration in Japan does not automatically trigger a name change. Each party must independently pursue any desired name change in their respective home countries.

Required Documents for Post-Marriage Name Update

For more on marriage procedures and legal documentation in Japan, see our guide on Marriage and Relationships in Japan.

Name Change After Divorce in Japan

Divorce also triggers potential name change procedures for foreign residents. If you were using your spouse's name (registered as tsushomei or in your home country records), you may wish to revert to your birth name.

Reverting to Your Original Name

• For tsushomei changes: Visit your local municipal office and request to update or remove the registered alias. You will need your divorce certificate (and certified translation if not in Japanese).
• For legal name changes in home country: Follow your home country's procedures for post-divorce name changes, then update your Japanese records within 14 days of receiving a new passport or official document reflecting the change.

Divorce and Visa Status

Name changes after divorce are independent of your visa status, but you should notify immigration of any name change on your official documents. If the divorce affects your visa type (e.g., if you held a spouse visa), consult an immigration specialist promptly. Read more about visa management in our Japan Visa and Immigration Guide.

Naturalization: The Path to a Fully Legal Japanese Name

Naturalization allows foreign residents to become Japanese citizens and, in the process, officially register a Japanese name. This is the only route to a fully legal Japanese name that appears in Japan's koseki family register system.

Naturalization Basics

• Applicants must typically have 5 years of continuous legal residence in Japan (3 years if married to a Japanese national)
• Applicants must demonstrate financial self-sufficiency and good conduct
• Japan does not permit dual citizenship — you must renounce your original nationality
• The process involves applications to the Ministry of Justice and can take 1–2 years

Post-Naturalization Name Registration

After your naturalization is approved, you will register your new Japanese name with the municipal office when your koseki (family register) is created. You may choose a name written in kanji, hiragana, or katakana — though kanji names for naturalized citizens are subject to the same restrictions as those for Japanese-born citizens (limited to official kanji).

For a complete overview of your legal rights and responsibilities as a foreigner in Japan, visit Amie International Administrative Scrivener Office's guide.

Summary: Name Change Options at a Glance

Practical Tips and Common Mistakes

Start with your home country documents. Japan cannot legally change a foreigner's name — that authority lies with your home country. If you need a legal name change, initiate it there first, then update your Japanese records.

Don't miss the 14-day window. Immigration law requires notification within 14 days of any change to your name on official documents. Missing this deadline can be noted on your residency record and potentially affect future applications.

Get certified translations early. If your documents are in a language other than Japanese, have them certified translated before your immigration appointment. Using a professional translator or certified administrative scrivener (行政書士) saves time and prevents rejected applications.

Tsushomei is not a passport name change. Your tsushomei is for daily use in Japan. It does not appear on your passport, does not change your home country records, and is not recognized internationally.

Consult a professional for complex cases. If your name change involves legal complications — such as a name that is difficult to render in katakana, or a change that spans multiple countries — consult a registered immigration lawyer (入管申請取次行政書士) before filing.

For more on handling official paperwork and daily life administration in Japan, explore our complete guide to Daily Life in Japan for Foreigners. You can also learn more about Japan's legal procedures in the Consulate-General of Japan's official guidance on name changes.

Navigating name changes in Japan as a foreigner requires understanding which government body handles each part of the process. By preparing the right documents, reporting changes within the required timeframe, and choosing the right pathway for your situation, the process can be completed smoothly. Whether you are updating your residence card after marriage, registering a Japanese alias for work, or pursuing full naturalization, Japan's system — while layered — is accessible with the right information.