Naturalization Residency Requirement Doubled to 10 Years (April 1, 2026)
Effective April 1, 2026, continuous residency for Japanese naturalization increased from 5 to 10 years. Tax records for 5 years and social insurance for 2 years are now required.
From April 1, 2026, Japan revised its naturalization screening guidelines, doubling the continuous residency requirement from 5 to 10 years. This is a guideline revision rather than a Nationality Act amendment. Tax records for 5 years (up from 1) and social insurance records for 2 years (up from 1) are now required. The change aligns naturalization with permanent residency standards. Special permanent residents (Zainichi Koreans, etc.) are exempt from the extended requirement.
Key Points
- Continuous residency for naturalization: 5 years → 10 years
- Tax record verification extended to 5 years; social insurance to 2 years
- Special permanent residents (Zainichi) are exempt from the extended requirement
Recommended Action
If you are considering naturalization, begin organizing 5 years of tax and social insurance payment records now. Consider obtaining JLPT N2 or above to prepare for potential future language requirements.