Japan – Citizenship

Who is eligible to apply for citizenship in Japan?

Japanese nationality may be acquired through three distinct mechanisms: birth, notification, and naturalisation. For the vast majority of foreign nationals living in Japan, naturalisation is the relevant pathway. Which category applies to you determines both the required length of residence and which conditions may be waived or reduced in your specific case.

General naturalisation

The Minister of Justice shall not permit the naturalisation of an alien unless they fulfil all of the following conditions: five or more consecutive years of domicile in Japan; being of legal adult capacity according to the law of their home country; being of upright conduct; being able to secure a livelihood through their own property or ability, or those of a spouse or family member sharing living expenses; having no nationality or agreeing that acquiring Japanese nationality will result in the loss of their foreign nationality; and never having plotted or advocated the overthrow of the Constitution of Japan or the Government.

Foreign nationals aged 18 or over (previously 20 prior to 1 April 2022) may pursue Japanese citizenship through naturalisation after residing in the country for a minimum of five years, renouncing any prior nationalities, and demonstrating financial self-sufficiency via employment or existing assets. Broadly speaking, Japan’s residency threshold is comparable to that of countries such as the UK (five years) or Australia (four years of permanent residency), though Japan’s approach places a particularly strong emphasis on financial stability and conduct records, encompassing tax payment history.

A basic command of Japanese is expected — specifically, reading and writing ability equivalent to the level of a third-grade Japanese primary school student. While this is not a formally codified requirement under the Nationality Act itself, language ability is assessed in practice during an interview conducted at the Legal Affairs Bureau.

Simplified naturalisation — marriage to a Japanese national

The Minister of Justice may permit the naturalisation of an alien who is the spouse of a Japanese national, provided that the couple has been married for three years or more and the applicant has had a domicile in Japan for one consecutive year or more. This means eligible spouses are exempt from the standard five-year continuous residency requirement, making this a considerably faster route. While spousal pathways to citizenship exist in many countries, Japan’s requirement to renounce your prior nationality distinguishes it from more lenient frameworks elsewhere.

Citizenship by descent

Any child born in wedlock to at least one Japanese parent is automatically a Japanese national, irrespective of where the birth occurs. Being born on Japanese territory does not in itself confer Japanese nationality, except where the child would otherwise have no nationality at all. Japan adheres to the doctrine of jus sanguinis — citizenship by bloodline — rather than jus soli — citizenship by place of birth — setting it apart from countries such as the United States, where birth on national soil is sufficient to acquire citizenship.

Simplified naturalisation — other special relationships

The Minister of Justice may permit naturalisation for someone who does not fulfil the standard five-year domicile requirement if they are: a biological child of a former Japanese national with three or more consecutive years of domicile or residence in Japan; born in Japan with three or more years of domicile or residence in Japan, or whose father or mother was born in Japan; or someone who has had a residence in Japan for ten consecutive years or more.

The Minister of Justice may also permit naturalisation of a foreign national who is a biological child of a Japanese citizen and has a domicile in Japan; an adopted child of a Japanese citizen who has continuously had a domicile in Japan for one year or more and was a minor under their national law at the time of adoption; a person who has lost their Japanese citizenship and has a domicile in Japan; or a person who was born in Japan without any nationality and has continuously had a domicile in Japan for three years or more.

Exceptional contribution (Grand Naturalisation)

With respect to an alien who has rendered especially meritorious service to Japan, the Minister of Justice may, notwithstanding the standard provisions, permit naturalisation with the approval of the Diet. As of 2024, there are still no actual documented cases of Grand Naturalisation, and it would be unlikely to acquire Japanese citizenship through this method.

Important note on upcoming changes

In November 2025, a Kyodo News report revealed that the Japanese government is moving toward tightening the requirements for naturalisation. Under the current system, a person may be eligible if they have lived in Japan for five consecutive years or more; however, the government is considering reviewing examination practices and effectively extending this requirement. At the same time, the government has indicated a direction toward placing greater weight on tax payment history and social insurance premium records. Prospective applicants should monitor official announcements closely, as requirements may change in the near future.

What are the steps involved in applying for citizenship in Japan?

Naturalisation is the formal procedure through which foreign nationals acquire Japanese citizenship by applying to the Minister of Justice via the Legal Affairs Bureau. All processing takes place at the Legal Affairs Bureau, with ultimate approval resting with the Minister of Justice. Applications must be lodged locally — at the Legal Affairs Bureau (法務局, Hōmukyoku) or Regional Bureau of Legal Affairs covering your place of residence.

Unlike systems such as the UK’s, which operate through a centralised online portal with a defined fee structure, Japan’s naturalisation process unfolds through a series of in-person appointments and document submissions over an extended period. No application fee is charged — submitting a naturalisation application in Japan costs nothing, as of 2025.

1. Preliminary consultation: Arrange an initial appointment with your local Legal Affairs Bureau — walk-in visits are not accepted. Officers will assess your eligibility and provide you with a document checklist tailored to your personal circumstances.
2. Gather your documents: Assemble the required materials, which typically include your Residence Certificate (住民票), tax and income certificates, proof of employment, birth and marriage certificates, and evidence of nationality. Every document in a foreign language must be accompanied by a Japanese translation. The specific documents required will vary based on your nationality, family situation, and occupation.
3. Follow-up bureau visits: Bureau officers will review your documents and may ask for corrections or supplementary materials. Expect to make multiple visits over the course of several months before your file is considered complete.
4. Submit your application: Once the bureau is satisfied that your documentation is in order, you will formally submit your application in person, including completed forms, photographs, a personal statement, and all supporting materials. No fee is payable at this stage.
5. Interview and investigation: Approximately one to three months after submission, you will attend an interview at the bureau. Officers will evaluate your Japanese language ability and review your personal background. Enquiries may also be made to your employer or landlord as part of the investigation.
6. Review period: The examination process generally takes between eight months and one year. During this phase, officials conduct background checks and independently verify the accuracy of everything you have submitted.
7. Official Gazette announcement: The Minister of Justice will, when permitting naturalisation, make an announcement to that effect by public notice in the Official Gazette. The naturalisation comes into effect from the date of that public notice.
8. Register your new status: Following the Official Gazette announcement, you must register in the Japanese family register (戸籍, koseki) at your local municipal office and formally renounce your prior nationality in accordance with Japanese law and the requirements of your country of origin.

Always consult the Ministry of Justice Nationality Q&A page and speak directly with your local Legal Affairs Bureau for the current document requirements and any procedural updates, as these can change over time.

What tests, interviews, or ceremonies are required as part of the citizenship process in Japan?

Japan’s naturalisation process does not involve a standalone civics examination or a standardised language proficiency test in the manner of other countries — there is no equivalent to the UK’s Life in the UK Test or the US civics exam that applicants book and sit at an external centre as a discrete step in the process.

Applicants are nonetheless expected to demonstrate Japanese language ability covering everyday conversation, reading, and writing. Although this is not explicitly stated as a statutory requirement in the Nationality Act, the Ministry of Justice incorporates a language assessment into its process. The expected standard corresponds to approximately the third grade of Japanese primary school — broadly equivalent to JLPT N4, the second-lowest level of the Japanese Language Proficiency Test.

An in-person interview at the Legal Affairs Bureau is a mandatory component of the process, typically scheduled one to three months after the formal application is lodged. During this interview, officers will assess your language skills and explore your personal circumstances. Likely topics include your daily life in Japan, your motivations for seeking citizenship, and your understanding of what living as a Japanese national entails. Since the interview is conducted entirely in Japanese, it functions as a practical language evaluation in its own right.

Background screening forms a substantial part of the overall assessment. Applicants must demonstrate upright conduct, which encompasses a clean record of tax and social insurance payments alongside the absence of any criminal history or traffic violations — including minor infractions such as parking or speeding offences. Officials may cross-reference records held by multiple government bodies, including tax authorities and immigration agencies.

Japan does not hold formal citizenship ceremonies of the kind common in countries such as Canada or Australia, where new nationals attend a public event and take a collective oath. Once the announcement of naturalisation is published in the Official Gazette, the change of status takes legal effect automatically. The applicant then completes the necessary administrative steps at the local municipal office to formalise their new identity in the family register.

What are the benefits of citizenship in Japan?

Upon acquiring kokuseki (nationality) and becoming a kokumin (national), a naturalised individual enjoys precisely the same rights as a person born Japanese. This complete legal parity between naturalised and native-born citizens is one of the defining characteristics of Japanese nationality.

Naturalisation transforms your legal identity — including your passport, civic obligations, and political rights. Japanese citizens are entitled to vote in both national and local elections, to stand as candidates for elected office, and to be considered for certain public sector positions that are reserved exclusively for nationals.

Among the most immediately tangible advantages is the Japanese passport. As of 2025, Japan’s passport is ranked 2nd globally, with a global mobility score of 190 — providing visa-free access to 144 countries and territories, visa-on-arrival access to 35 countries, ETA access to 12 countries, and e-Visa access to 14 countries. This translates into an exceptional degree of international travel freedom relative to most other nationalities.

Japanese citizens also enjoy unrestricted and permanent access to Japan’s universal healthcare system, the right to live and work in Japan without any need for visa renewals, and full participation in the public pension system on equal terms. While permanent residency allows long-term residence, it does not confer voting rights and can in principle be revoked — citizenship provides a level of security and permanence that no residence permit can match.

Citizens are eligible for a broader range of public service and government roles that are closed to non-nationals, and have an unconditional right to sponsor immediate family members for residence in Japan. The complete immunity from deportation afforded to Japanese citizens offers a degree of stability and certainty that no visa category can replicate.

Does Japan allow dual citizenship, or will you have to renounce your existing nationality?

Dual citizenship of Japan and another country is prohibited in some cases due to the provisions for loss of Japanese nationality when a Japanese national naturalises in another country, and the requirement to renounce one’s existing citizenships when naturalising in Japan. Japan’s stance on this issue is among the most stringent of any developed nation.

The Japanese Nationality Law is founded on the principle of single nationality. If you hold both Japanese and foreign citizenship and became a dual national before the age of 18, you are required to select one nationality by the age of 20; if dual status was acquired after the age of 18, the choice must be made within two years.

There remain certain scenarios in which a person may hold citizenship of both Japan and another country — for instance, those who acquire multiple nationalities at birth through one non-Japanese parent, or through being born in a country that grants citizenship based on birthplace. However, such individuals must still elect a single nationality before the age of 22, or within two years if the second citizenship is obtained after turning 20.

In cases where, despite a foreign national’s intention, they are unable to give up their nationality due to their home country’s laws, the Minister of Justice has some discretion to permit naturalisation even if that condition has not been strictly met — but only if special circumstances relating to a familial relationship or circumstances with a Japanese citizen are found. This represents an uncommon exception rather than an accessible alternative route.

The Japanese government has maintained that permitting dual nationality for adults could “cause conflict in the rights and obligations between countries, as well as between the individual and the state.”

It is equally important to examine the rules that apply in your current country of nationality. Many countries treat the voluntary acquisition of another country’s citizenship as grounds for automatic or voluntary loss of the original. Before proceeding, confirm with your home country’s official immigration or foreign affairs authority how gaining Japanese citizenship would affect your existing nationality.

How long does it typically take to become a citizen of Japan?

Becoming a Japanese citizen demands a multi-year commitment. The clock begins on your first day of lawful residence in Japan and does not stop until the Minister of Justice formally grants approval and the announcement is published in the Official Gazette.

From the point of formal application submission, the review process typically runs for 10 to 12 months. For special permanent residents, the examination period is shortened and permission may be obtained in a relatively short period.

All time spent in Japan must be on valid legal status, and lengthy absences or frequent prolonged trips abroad risk disrupting the “continuous” residence requirement. This is a critical practical consideration: even relatively brief extended periods outside Japan during the qualifying window can pause or reset the residency count. It is essential to keep all visa renewals current throughout the qualification period and to maintain valid residence status while your application is under review.

Note that as of late 2025, the Japanese government and ruling parties have begun considering tightening the requirement for acquiring Japanese nationality to 10 years of residency or longer in principle, compared with the current five years. If these changes are enacted, the minimum overall timeline would increase considerably. Consult the Ministry of Justice website for the most current official requirements before you begin planning your application.

What are the main reasons an application for citizenship in Japan might be refused?

Satisfying the minimum naturalisation criteria does not make approval automatic. The Minister of Justice retains complete discretionary authority over every outcome, and a technically compliant application may still be declined. Familiarity with the most frequent grounds for refusal can help applicants identify and address weaknesses before submitting.

• Insufficient or interrupted residency: An inability to demonstrate five consecutive years of lawful domicile — whether due to gaps from extended time overseas or periods spent on an invalid visa — is among the most common obstacles applicants encounter.
• Criminal record or traffic violations: Applicants must have no criminal record or traffic violations, including parking and speeding offences. Even minor infractions that would have no bearing on a visa application can weigh against a naturalisation decision.
• Tax or social insurance arrears: Any tax delinquency and failure of pension payment are considered unfavourable conditions in the application process. Outstanding tax obligations or unpaid social insurance contributions are treated as serious negative factors.
• Insufficient financial stability: Applicants who cannot show that their household maintains a stable income or adequate assets to be financially self-sustaining may be refused. This applies even where a spouse is the primary earner supporting the household.
• Inadequate Japanese language ability: Failure to demonstrate satisfactory conversational ability and basic literacy during the bureau interview will count strongly against an application.
• Incomplete or inaccurate documentation: Missing, expired, incorrectly translated, or falsified documents can result in outright refusal. The application process is lengthy and demands a wide variety of materials, some of which may need to be sourced from your home country.
• Political grounds: Any applicant who has plotted or advocated, or formed or belonged to a political party or other organisation that has plotted or advocated the overthrow of the Constitution of Japan or the Government, will be refused.
• Failure to renounce prior nationality: Where an applicant is unable to demonstrate that they have renounced, or will renounce, their existing nationality upon acquiring Japanese citizenship, the application will generally not be approved.

Japan does not have a statutory appeals mechanism for rejected naturalisation applications. Where the underlying reasons for a refusal can be resolved, reapplication may be possible in due course. In practice, this involves addressing the specific issues identified — for example, clearing outstanding tax debts, waiting until a traffic offence no longer weighs against you, or reaching a higher level of Japanese language proficiency — before lodging a fresh application.

Where can you find reliable, up-to-date information about citizenship in Japan?

Given that Japan is actively considering changes to its naturalisation requirements and that the documents required vary considerably from one applicant to the next, consulting official government sources directly is indispensable. No third-party resource — whether an immigration lawyer’s website, an online forum, or an expat guide — should be treated as a substitute for authoritative official information.

• Ministry of Justice (Nationality Q&A): The principal official source for naturalisation requirements, the legal framework governing decisions, and documentary guidance. Visit: www.moj.go.jp — Nationality Q&A (English)
• Japanese Nationality Act (official English translation): The complete text of the legislation governing all aspects of Japanese nationality. Visit: www.moj.go.jp — The Nationality Law (English)
• Your local Legal Affairs Bureau (法務局): You should contact the Legal Affairs Bureau or Regional Bureau of Legal Affairs with jurisdiction over your residence before applying. This is where your application will be lodged and where officers will provide personalised guidance on your document requirements.
• Immigration Services Agency of Japan: For questions relating to residence status, visa renewals, and related matters during the period leading up to naturalisation. Visit: www.isa.go.jp (English)
• Your home country’s embassy or consulate in Japan: For guidance on how acquiring Japanese citizenship may affect your existing nationality, and for assistance in obtaining home-country documents required as part of your application.

Official government websites are the only dependable source of current requirements, fees, and processing times. Given the policy reviews announced in late 2025, requirements are especially subject to change — always verify the most recent information before commencing your application.

Frequently asked questions

Do children born in Japan automatically acquire Japanese citizenship?

Birth in Japan does not by itself entitle a child to Japanese nationality, except when a child would otherwise be stateless. Children born to at least one Japanese parent are generally automatically nationals at birth. If neither parent is Japanese, the child will not automatically acquire Japanese citizenship simply by being born on Japanese soil.

Is permanent residency required before applying for naturalisation?

No. Permanent residency (永住権, eijūken) and naturalisation are entirely separate systems in Japan. Permanent residency is not required before applying for Japanese citizenship — you can apply while on other valid visa statuses if you meet the naturalisation requirements.

Can Japanese citizenship be lost or revoked?

A Japanese citizen loses Japanese citizenship if they acquire the nationality of a foreign country at their own choice. Japanese nationals who voluntarily acquire a foreign nationality automatically lose their Japanese nationality. Citizenship may also be lost if a dual national fails to choose a single nationality within the prescribed timeframe.

What happens if I move abroad during my naturalisation application?

Leaving Japan during an active naturalisation application is likely to result in the application being discontinued, as a current domicile in Japan is a core requirement throughout the process. If you move abroad, your application cannot proceed. You would need to re-establish qualifying residency before reapplying. Always inform the Legal Affairs Bureau of any planned extended absence.

Can I choose a Japanese name after naturalisation?

You can freely choose a name using hiragana, katakana, and kanji from the personal name kanji list. However, if you are a married couple, your last name must be the same as your spouse. You are not legally required to adopt a traditional Japanese name, and many naturalised citizens retain a name close to their original name.

Do I need to give up my current passport when I become a Japanese citizen?

Yes. When you obtain Japanese citizenship, you need to give up your existing passport. Japan does not recognise second or dual citizenship. You will be required to renounce your existing nationality and surrender your foreign passport as part of completing the naturalisation process. The specific steps for renunciation depend on the laws of your country of origin.

Does my family benefit if I naturalise?

If both a parent and their minor child simultaneously apply for naturalisation, permission will be concurrently granted in most cases. Minor children can be included in a parent’s application. A naturalised Japanese citizen can also sponsor close family members for residence in Japan, though family members do not automatically acquire citizenship.

Can someone who has previously lost Japanese nationality reacquire it?

Once you acquire foreign citizenship at will and lose your Japanese nationality, you can only reacquire Japanese nationality by residing in Japan and applying for naturalisation. Former Japanese nationals may benefit from simplified naturalisation conditions under Article 8 of the Nationality Act, which can reduce the residency and other requirements that would otherwise apply.

Are there any investment or business routes to Japanese citizenship?

Japan does not operate a formal citizenship-by-investment programme of the kind offered by some other countries. The only route to citizenship for those without Japanese heritage is standard naturalisation, which requires meeting all the residency, conduct, financial, and language requirements set out in the Nationality Act. Exceptional contribution naturalisation (Grand Naturalisation) exists in law but has never been used in practice.

Can Japan revoke naturalised citizenship?

The Nationality Act does not contain a general provision for arbitrary revocation of naturalised citizenship. However, naturalised citizenship can be lost if an individual subsequently voluntarily acquires a foreign nationality, or if fraud or false information is later discovered in the original application. Submitting false information in a naturalisation notification is a criminal offence under the Act. As with all legal matters, consult a qualified legal professional for advice specific to your situation.