🇯🇵 Japan · Citizenship
Naturalization and citizenship-by-investment: residence years, language and civics tests, dual-citizenship rules, and multi-passport planning.
Quick answer
Japanese naturalization generally requires about five years of continuous residence, good conduct, stable finances and renouncing other nationalities (Japan does not permit dual nationality for adults). The Ministry of Justice decides applications.
Japanese citizenship is acquired by naturalisation (kika), permitted at the discretion of the Minister of Justice. Applicants generally need at least five years' continuous residence, a stable independent livelihood, good conduct and basic Japanese-language ability. Critically, Japan does not permit dual nationality in principle — approval requires willingness to renounce your current nationality, completed after approval. Applications are made in person at a Legal Affairs Bureau.
- General conditions: usually five years' continuous residence, a stable independent livelihood, good conduct and basic Japanese-language ability.
- Japan does not allow dual nationality in principle — approval requires willingness to renounce your original nationality, completed after approval.
- Naturalisation is discretionary (Minister of Justice); review typically takes about six months to two years.
- Apply in person at the competent Legal Affairs Bureau (a legal representative applies for under-15s).
Official authorities
- Ministry of Justice — Nationality (Naturalisation)
Official authority for naturalisation in Japan.
- Ministry of Justice — Nationality Q&A
Official questions and answers on nationality.
Frequently asked questions
How long must I live in Japan to naturalize?
Generally at least five years of continuous residence, with some reductions for spouses of Japanese nationals.
Does Japan allow dual nationality?
Generally no — adults acquiring Japanese nationality are expected to renounce other nationalities.
Who decides naturalization?
The Ministry of Justice reviews and approves naturalization applications.
Official-information aggregation, not legal advice. Always verify on the authority's own site.
Government portals
- Prime Minister's Office of Japan — Official site of Japan's Prime Minister — cabinet policies, press conferences, policy statements
- Ministry of Foreign Affairs of Japan — Japan visa applications, overseas safety info, consular services, and diplomatic policy
- Immigration Services Agency of Japan — Residence status, work visas, permanent residency, and naturalization in Japan
- National Tax Agency (Japan) — Income tax, corporate tax, consumption tax filing and e-Tax online submission