Japan doubles residency requirement for naturalization to 10 years

The Japanese Ministry of Justice has officially enacted a major policy shift regarding national citizenship, doubling the minimum residency requirement for naturalization from five years to 10 years, effective April 1, 2026. This move, which aligns naturalization standards with the existing 10-year requirement for permanent residency, signifies a tightening of borders under the direction of Prime Minister Sanae Takaichi.

The new regulations introduce significantly stricter financial and social oversight for all applicants. Verification of tax payments will now span a five-year period—up from just one year—while checks for social insurance contributions have doubled to a two-year requirement. Crucially, these updated rules are retroactive, meaning they apply even to foreign nationals who have already submitted their applications but have not yet received a decision.

According to government officials, the extension is intended to ensure "social compatibility" and a deeper level of integration into Japanese society. Prime Minister Takaichi previously expressed concerns that the former rules were too lenient, prompting a broader package of foreign resident policy measures compiled earlier this year. Beyond the time spent in the country, the Ministry continues to evaluate "good conduct," financial stability, and the ability to communicate effectively in Japanese as core components of the assessment.

The legal process remains rigorous, requiring applicants to renounce their original nationality and prove they hold no affiliations with groups opposing Japan’s constitutional order. While the bar for entry has been raised, the demand for Japanese citizenship remains steady. In 2025, the Civil Affairs Bureau granted citizenship to over 9,200 individuals out of approximately 14,000 applicants, with Chinese and South Korean nationals making up the majority of those approved.

As of mid-2025, the number of foreign nationals holding permanent residency in Japan stood at over 932,000, a slight increase from previous periods. However, with these new hurdles in place, the path from residency to full citizenship has become significantly more demanding. The Ministry’s focus remains firmly on ensuring that new citizens have demonstrated a long-term, stable commitment to the nation’s social and economic fabric.