日本故鄉稅（ふるさと納税）試算
Estimate your Japan furusato-nozei (hometown tax) donation limit from your annual salary and family structure. Donating up to the limit costs you only ¥2,000 out of pocket — the rest comes back as income- and resident-tax deductions, and you still keep the municipalities' return gifts.
針對受薪者的簡易估算（社會保險約為年收入的15%）。未包含醫療、房貸或 iDeCo 等扣除。正確上限請向當地政府或報稅確認。
常見問題
What is furusato nozei?+
It is Japan's 'hometown tax' donation system. You donate to municipalities of your choice; everything above a ¥2,000 self-payment is deducted from your income and resident tax, and you receive return gifts (typically worth about 30% of the donation).
How is the limit decided?+
The cap is based on roughly 20% of your resident-tax income levy, which depends on your salary, family structure and deductions. Donating above the limit means the excess is no longer deductible.
Is this amount exact?+
It is a simplified estimate for a salaried employee (social insurance assumed ≈15% of salary). Medical, mortgage or iDeCo deductions change the limit. Confirm the exact figure with your municipality or tax return.