2026 Income Tax Return (Kakutei Shinkoku) — Filing Period Opens

The filing period for 2026 income (Reiwa 8) runs 16 February – 15 March 2027. You usually need to file if you were self-employed or freelance, had more than one employer or side income over ¥200,000, left a job mid-year without a year-end adjustment, or want to claim medical, furusato nozei or first-year housing-loan deductions. Residents who send money to dependants abroad need the remittance records. e-Tax with a My Number card is the fastest route.