Inheritance Tax Basic Deduction and Rates
Japan's inheritance tax includes a basic deduction of 30 million yen + 6 million yen × the number of legal heirs. For a spouse and two children, the basic deduction is 48 million yen. If the total estate is below this amount, no inheritance tax is owed. The portion exceeding the basic deduction is subject to progressive tax rates ranging from 10% to 55%.
Spouses benefit from a special tax reduction that exempts them from inheritance tax on the greater of their legal inheritance share (typically half the estate) or 160 million yen. By utilizing this provision, the spouse's inheritance tax burden is effectively zero in most households.
A Concrete Inheritance Tax Calculation
Let's calculate for an estate of 80 million yen with a spouse and two children as legal heirs. The basic deduction is 30 million yen + 6 million yen × 3 = 48 million yen. The taxable estate is 80 million yen - 48 million yen = 32 million yen. Divided by legal inheritance shares: spouse 16 million yen, each child 8 million yen.
Applying the tax rates: the spouse's portion is 16 million yen × 15% - 500,000 yen = 1.9 million yen; each child's portion is 8 million yen × 10% = 800,000 yen; total is 3.5 million yen. However, the spousal tax reduction brings the spouse's tax to zero, so the actual tax payment is 1.6 million yen for the two children combined. Lifetime gifts can reduce this amount further.
Transferring Assets Systematically Through Lifetime Gifts
In Japan, gifts of up to 1.1 million yen per year are exempt from gift tax (annual gift exclusion). By gifting 1.1 million yen to a child each year, you can transfer 11 million yen tax-free over 10 years. If the child invests the gifted funds in a NISA account, they benefit from both the gift tax exemption and the investment tax exemption.
Starting in 2024, the Settlement-at-Inheritance taxation system (Sozoku-ji Seisan Kazei) added a new annual basic deduction of 1.1 million yen, expanding the options alongside the annual gift exclusion. Which system is more advantageous depends on family composition and asset size, so consulting a tax professional is recommended. Practical books on inheritance tax planning help you understand the basic deduction calculations and available tax-saving options.
Integrated Planning for Investing and Inheritance
Wealth building and inheritance planning should not be treated separately but planned as an integrated whole. For example, secure your own retirement funds through iDeCo and NISA, transfer surplus funds to your children through lifetime gifts, and have them invest in their own NISA accounts. Also utilize the life insurance tax-free allowance (5 million yen × number of legal heirs) to secure funds for inheritance tax payment. Combining multiple systems enables cross-generational wealth building.
The life insurance tax-free allowance is often overlooked. With three legal heirs, up to 15 million yen can be received tax-free. Utilizing this allowance alone can reduce inheritance tax by hundreds of thousands to millions of yen. Books on lifetime gift strategies explain how to choose between the annual gift exclusion and the Settlement-at-Inheritance system.
Next Steps - Start Your Inheritance Planning
First, estimate whether inheritance tax will apply based on your current total assets and number of legal heirs. If your estate exceeds the basic deduction, consider utilizing lifetime gifts and life insurance. For larger estates, consult a tax professional early to develop a long-term inheritance planning strategy.
Try our simulator to see the future asset value when gifted funds are invested through NISA. Combining gifts with investing demonstrates the power of cross-generational wealth building.