Japan child allowance 2026: ¥15,000/month for children 0–2, ¥10,000/month for 3–15, extended to age 18 from October 2024. Foreign residents fully eligible regardless of nationality. Tokyo 018 Support adds ¥5,000/month per child under 18. A family with 2 kids could save ¥1–2 million yen per year — most expats don't know they qualify.