Japan Tightens Citizenship Path With 10-Year Residency Rule

The Japanese government has increased the mandatory residency period for foreign nationals seeking citizenship from five to ten consecutive years, tightening the naturalisation process under revised administrative guidelines.

The new rule, which takes effect on April 1, 2026, was announced by the Justice Ministry and introduces stricter documentation requirements alongside the extended residency threshold.

Justice Minister Hiroshi Hiraguchi explained that the changes address legislative concerns regarding the relative ease of acquiring Japanese nationality compared to permanent residency. “The changes aim to address concerns that obtaining Japanese nationality has been easier than securing permanent residency. Lawmakers had raised questions in parliament last year, noting that citizenship grants voting rights, and argued it should not be simpler to acquire than permanent residency,” Hiraguchi said.

Under the updated framework, applicants must now submit two years of social insurance records and five years of tax payment certificates—a significant expansion from previous documentation requirements.

A ministry official clarified that the revisions affect administrative guidelines rather than the Nationality Act itself, which formally still stipulates five years of residence. However, the new guidelines bring citizenship standards closer to those for permanent residency. “Naturalisation applications undergo comprehensive screening, and most successful applicants typically have lived in Japan for ten years or longer,” the official said.

Applicants who filed before April 1 under the previous five-year rule will still be assessed based on existing criteria, with final decisions subject to the minister’s discretion.

The policy shift follows sustained parliamentary debate over the civic implications of naturalisation. Lawmakers had noted that citizenship confers voting rights and should not be more accessible than permanent residency, which carries fewer civic privileges.

According to Justice Ministry data, more than 9,200 foreign nationals were naturalised in 2025, with Chinese and South Korean citizens forming the majority. By contrast, approximately 932,000 foreigners held permanent residency in Japan as of June 2025.