An Overview of Japanese Inheritance Tax (相続税)
Japan levies an inheritance tax (相続税, sōzoku-zei) on assets received through inheritance or bequest. Japan's top marginal rate of 55% makes it one of the highest inheritance taxes in the world, but the effective rate paid by most estates is considerably lower once the basic exemption and deductions are applied.
Understanding how the tax is structured — and what reliefs are available — is essential for anyone managing a Japanese estate.
Step 1: Calculate the Taxable Estate
The starting point is the gross taxable estate: the total value of all assets subject to tax, including real estate, bank deposits, securities, business interests, and certain pre-death gifts. From this, you subtract:
- Debts and liabilities of the deceased
- Funeral expenses (up to a reasonable amount)
- The basic exemption (see below)
The Basic Exemption (基礎控除)
Every estate benefits from a basic exemption before tax is applied. The formula is:
¥30,000,000 + (¥6,000,000 × number of statutory heirs)
For example, an estate with a spouse and two children (3 statutory heirs) would have a basic exemption of ¥30M + (¥6M × 3) = ¥48,000,000. Estates valued below this threshold owe no inheritance tax and are not required to file a return.
Tax Brackets (2024)
After subtracting the basic exemption, the remaining taxable amount is distributed among heirs according to their statutory shares, and each heir's portion is taxed at progressive rates:
| Taxable Inheritance (per heir) | Tax Rate | Deduction |
|---|---|---|
| Up to ¥10,000,000 | 10% | — |
| ¥10,000,001 – ¥30,000,000 | 15% | ¥500,000 |
| ¥30,000,001 – ¥50,000,000 | 20% | ¥2,000,000 |
| ¥50,000,001 – ¥100,000,000 | 30% | ¥7,000,000 |
| ¥100,000,001 – ¥200,000,000 | 40% | ¥17,000,000 |
| ¥200,000,001 – ¥300,000,000 | 45% | ¥27,000,000 |
| ¥300,000,001 – ¥600,000,000 | 50% | ¥42,000,000 |
| Over ¥600,000,000 | 55% | ¥72,000,000 |
The individual tax amounts are then aggregated to get the total tax pool, which is then split among heirs in proportion to what each actually receives.
Key Deductions and Exemptions
Spousal Deduction (配偶者控除)
The surviving spouse pays no inheritance tax on amounts up to the greater of ¥160,000,000 or their statutory share of the estate. This is one of the most powerful reliefs in the Japanese system.
Minor Child Deduction
Heirs who are minors (under 18) receive a deduction of ¥100,000 per year until they reach 18.
Disabled Person Deduction
Heirs with disabilities receive a deduction of ¥100,000–¥200,000 per year until age 85.
Non-Lineal Heir Surcharge
Heirs who are not direct lineal relatives (children, parents) or spouses — such as grandchildren who inherit directly, or siblings — face a 20% surcharge on their calculated tax amount.
Filing Deadline
Inheritance tax returns must be filed and paid within 10 months of the date of death. Missing this deadline can result in penalties and interest. Extensions are generally not available, so early preparation is critical for complex or large estates.
Who Must File?
Any heir whose taxable inheritance exceeds their share of the basic exemption must file a return with the tax office (zeimusho) covering the deceased's last place of residence in Japan. Even if no tax is owed (e.g., because the spousal deduction eliminates all liability), a return is still required to claim certain deductions.