Japanese language level for naturalization (帰化): what the interview tests

The naturalization Japanese test (帰化 language check) has no published format. As of October 2026 the Ministry of Justice says you need enough Japanese for daily life, including conversation and reading and writing. It publishes no JLPT cutoff and no test format. Law offices report a practical benchmark of about third-grade elementary level, checked at consultation, in your documents and at an interview.

What does the Ministry of Justice say about Japanese ability?

The Ministry’s nationality Q&A lists, among conditions showing you fit into Japanese society, having enough Japanese for daily life in both conversation and reading and writing. It also mentions 10 or more years of stay.

It gives no proficiency level, no certificate requirement and no description of a test. It says that application documents vary by nationality, status and job, and that you should consult the bureau. The application page lists review standards as “none” (ありません).

For the full process, see the naturalization process.

What level do practitioners report?

A private law office reports the practical benchmark is about third-grade elementary school Japanese (小学校3年生程度). The same source says:

• Speaking alone is not enough. Reading and writing are required.
• JLPT N4 or higher, or JFT-Basic A2 or higher, is listed as accepted proof. Neither is an official requirement.
• A bureau may give its own test even if you hold a certificate.
• Language can be judged at four points: the first consultation, the documents you write, when your application is accepted, and the interview.

The same office notes that the Tokyo Legal Affairs Bureau issued a notice about changed handling of naturalization on April 1, 2026, but it did not describe what changed for language. We could not confirm the details.

Is there a written test?

The official pages we checked do not mention one. A law office reports a test of about 15 minutes at some bureaus. Formats it lists:

• reading kanji aloud;
• writing kanji for hiragana words;
• converting between hiragana and katakana;
• reading a short passage and choosing an answer.

Content varies by bureau.

What does the interview ask?

A law office reports the interview comes after you submit your application, about 3 to 4 months later. It can last from about 30 minutes to over 2 hours.

Reported questions fall into four groups:

1. Why you want to become Japanese, when you came to Japan and how long you have lived here.
2. Your family: members, birth dates and birthplaces, marriage history.
3. Work and money: your job, income and savings.
4. Conduct: tax and pension payments, bankruptcy, traffic violations and criminal record.

Most questions come from your own documents, which include a statement of motive (帰化の動機書) and a résumé (履歴書). Be able to explain them in Japanese without notes.

How should I prepare as a foreign resident?

• Book the consultation at the Legal Affairs Bureau for your address first. It is where your level is first judged. Ask about language testing there.
• Practice reading and writing, not only speaking. Learn to write your own address, job history and reasons in Japanese.
• Applicants aged 15 or over apply in person. A legal representative applies for children under 15.
• If you plan to use a certificate, treat it as support, not a substitute.

Your visa type matters for the other conditions. Check permanent residency vs naturalization if you are still deciding.

More guides

• Japanese naturalization process
• Permanent residency vs naturalization
• Permanent residency requirements
• Dual nationality in Japan