🛂 Naturalization Rules Tightened!
Effective April 1, 2026 — 10yr residence, 5yr tax, 2yr insurance now effectively required
📋 Overview of changes
From April 1, 2026, the screening process for acquiring Japanese nationality (naturalization) has been significantly tightened. While the legal requirement was "5+ years of residence," the practical screening criteria have been substantially raised.
⚖️ Before vs After
❌ Before
✅ After
🔎 Specific tightening points
Effective residence extension
Legally 5 years, but practically ~10 years of residence is now expected. Same standard as permanent residency (10 years).
Expanded tax records
5 years of income tax, resident tax, and business tax certificates required. Unpaid taxes may result in rejection.
Stricter insurance verification
2 years of National Health Insurance and National Pension payment records are strictly verified.
Stricter conduct requirements
Traffic violations (including parking), minor legal violations are also screened. 5 years of clean record preferred.
👥 Who's affected?
- ●Permanent/long-term residents considering naturalization
- ●Spouses of Japanese nationals (marriage-based naturalization also tightened)
- ●Long-term work visa holders
- ●Former students who transitioned to work visas