Japan Reveals 6 Requirements Foreigners Must Meet to Gain Citizenship Through Naturalisation

Japan’s Ministry of Justice has outlined six key legal conditions that foreign nationals must satisfy before they can obtain Japanese citizenship through the naturalisation process.

Under Article 5 of Japan’s Nationality Act, applicants must meet strict requirements, including having a continuous domicile in Japan for at least five years, maintaining a valid legal status of residence, demonstrating good conduct, and proving they have a stable livelihood.

However, Japan does not require every applicant to have personal income. A person may still meet the livelihood requirement if they are financially supported by a spouse or other family member living with them.

Even after meeting all legal conditions, approval is not automatic. Naturalisation is granted at the discretion of the Minister of Justice, who reviews each application individually. Once approved, the decision is officially announced in Japan’s Official Gazette, and naturalisation takes effect on the date of official notification.

Six Conditions for Japanese Citizenship Through Naturalisation

1. Continuous Residence in Japan

Applicants must have maintained a domicile in Japan for at least five consecutive years before applying for naturalisation.

During this period, they must hold a valid residence status and demonstrate a stable connection to life in Japan.

2. Legal Capacity

Applicants must generally be 18 years or older and have legal capacity according to the laws of their home country.

The minimum age requirement was lowered from 20 to 18 following Japan’s legal reforms that took effect on April 1, 2022.

3. Good Conduct

Applicants must demonstrate good character and behaviour.

Japanese authorities examine factors such as:

• Criminal records
• Tax payment history
• Compliance with Japanese laws
• Overall conduct and contribution to society

Failure to meet these standards may result in an application being rejected.

4. Financial Stability and Livelihood

Applicants must show that they have the ability to support themselves financially in Japan.

However, Japan evaluates this requirement based on the applicant’s overall household livelihood, not only their personal earnings.

This means a person without employment or independent income may still qualify if their living expenses are reliably covered by a spouse, family member, property income, or other legitimate financial resources.

5. Avoiding Dual Nationality

Japan generally requires applicants to avoid holding multiple nationalities.

A person seeking Japanese citizenship must usually either:

• Have no existing nationality, or
• Agree to give up their current citizenship after acquiring Japanese nationality

An exception may apply when it is legally impossible for the applicant to lose their original nationality.

6. Respect for Japan’s Constitution and Government

Applicants may be denied naturalisation if they have participated in organisations or activities that aim to overthrow Japan’s government through unconstitutional means or threaten the country’s constitutional order.

How Japan’s Naturalisation Process Works

Meeting the six requirements does not automatically guarantee Japanese citizenship.

The naturalisation process is discretionary, meaning the Ministry of Justice carefully examines each applicant’s circumstances before making a final decision.

Officials consider factors such as residence history, legal compliance, financial stability, family circumstances, and whether the applicant is likely to become a responsible member of Japanese society.

Foreign nationals who believe they meet the requirements must submit their application through the appropriate legal channels, usually by consulting the Legal Affairs Bureau in their area of residence.

Each application is reviewed individually, and citizenship is granted only after approval by the Minister of Justice and official publication of the decision.

Japan’s naturalisation system remains one of the strictest among developed countries, requiring applicants to demonstrate long-term commitment, good character, and a stable life in the country.