Estate Tax in Japan: Structure and Current Rates

Japan’s estate tax system imposes a progressive national levy on inherited assets, with rates ranging from 10% to 55% depending on the value of the estate and the heir’s relationship to the deceased. As of April 2026, the basic exemption threshold is ¥30 million plus ¥6 million per statutory heir. For a deceased individual with a spouse and two children, the exemption reaches ¥48 million. Any estate value above that threshold is subject to taxation. The top marginal rate of 55% applies to inherited amounts exceeding ¥600 million per heir, making Japan’s estate tax one of the steepest among OECD nations.

The tax base includes real property, financial assets, and personal effects held at the time of death. Real estate is assessed using the 路線価 (rosen-ka, the official roadside land valuation published annually by the National Tax Agency) for land and the 固定資産税評価額 (kotei-shisan-zei-hyouka-gaku, the fixed asset tax assessed value) for buildings. These valuations historically ran 70% to 80% of market prices, creating a structural discount that some taxpayers used to reduce taxable estates by shifting liquid assets into real property.

Residency Status and Tax Scope for Foreign Nationals

Foreign nationals face different estate tax obligations depending on their residency status at the time of death and the location of their assets. Under Japanese law, an individual is classified as a resident for estate tax purposes if they held a 住所 (jusho, domicile) in Japan. Domicile is determined by the location of the individual’s principal life base, assessed through factors including visa status, length of stay, family location, and economic ties.

As of the 2026 tax reform framework, foreign nationals who had a domicile in Japan at any point within the ten years preceding death are subject to estate tax on their worldwide assets. Those who held no Japan domicile within that ten-year window are taxed only on assets located within Japan. This ten-year lookback rule means that even individuals who have departed Japan can remain exposed to worldwide taxation if the inheritance event occurs within a decade of their departure.

For foreign heirs inheriting from a Japanese resident, the heir’s own residency status also matters. If the heir held a Japan domicile at any point within the ten years before inheritance, they are taxed on worldwide inherited assets. If the heir is a non-resident who has not held Japan domicile within that period, only Japan-situs assets are taxable. This dual-residency test creates planning complexity for international families with members in multiple jurisdictions.

Permanent residency status, or 永住権 (eijuuken), does not exempt foreign nationals from estate tax. A permanent resident who holds Japan domicile is treated identically to a Japanese national for estate tax purposes, with worldwide assets included in the taxable estate.

The 2026 Property Valuation Reform and Its Impact

A significant change announced in December 2025 and taking effect on 1 January 2027 targets the valuation of investment real estate for estate and gift tax purposes. Previously, rental properties were assessed using the 路線価 and 固定資産税評価額 formulae, which often resulted in valuations 60% to 70% below market prices. High-net-worth individuals exploited this gap by purchasing condominiums in central Tokyo, particularly in Minato-ku (港区) and Shibuya-ku (渋谷区), to compress the taxable value of their estates.

The 2026 reform introduced a market-value adjustment mechanism for properties where the assessed value diverges significantly from actual transaction prices. The National Tax Agency now applies a correction factor based on recent comparable sales, rental yields, and building age. For a condominium in Azabu (麻布) purchased for ¥500 million but assessed at ¥320 million under the old formula, the new mechanism may push the taxable value to ¥450 million or higher, depending on market conditions at the time of death.

This reform particularly affects luxury マンション (manshon, freehold condominium units) in prime districts. A 150-square-meter unit in Roppongi Hills that previously offered a 40% valuation discount may now be assessed at 90% of its market price. The change does not apply to owner-occupied primary residences below a certain threshold, but investment properties and second homes face the full adjustment. Foreign buyers who acquired Tokyo real estate as part of an estate planning strategy should reassess their positions in light of the new valuation rules.

For a broader overview of how property taxes interact with ownership structures, see Japan Real Estate Tax: Complete 2026 Guide for Foreign Buyers in Tokyo.

Calculation, Filing, and Payment Obligations

Estate tax in Japan is calculated on the net estate after deducting debts, funeral expenses, and the basic exemption. The estate is then notionally divided among statutory heirs according to the Civil Code’s default inheritance shares, even if the actual distribution differs. Each heir’s notional share is taxed at the progressive rate schedule, and the resulting amounts are summed to determine the total estate tax. This total is then allocated to actual heirs in proportion to what they receive.

The standard filing deadline is ten months from the date of death. The tax return, known as the 相続税申告書 (souzoku-zei-shinkoku-sho), must be submitted to the tax office with jurisdiction over the deceased’s final domicile. Payment is due in full at the time of filing, although installment payment plans are available in cases of liquidity hardship. Extensions are rarely granted, and late filing incurs penalties of 5% to 20% of the unpaid tax, plus annual interest.

Foreign heirs residing outside Japan may appoint a tax agent, or 納税管理人 (nouzei-kanri-nin), to handle filing and payment on their behalf. This agent must be a resident of Japan and is responsible for correspondence with the tax authorities. For estates that include Tokyo real estate, the agent typically coordinates with a 税理士 (zeirishi, licensed tax accountant) to prepare the valuation reports and complete the return.

Inheritance of real property also triggers a separate obligation: registration of title transfer, or 相続登記 (souzoku-touki), at the Legal Affairs Bureau. As of April 2024, this registration became mandatory within three years of inheritance, with penalties for non-compliance. The registration tax is 0.4% of the property’s assessed value, separate from estate tax.

Planning Strategies and Common Pitfalls

Foreign nationals with significant assets in Japan have several tools to manage estate tax exposure. The most common is the spousal exemption, which allows a surviving spouse to inherit up to ¥160 million or half of the net estate, whichever is greater, without incurring estate tax. This exemption applies regardless of the spouse’s nationality, provided the couple was legally married under Japanese or foreign law recognized in Japan.

Gifting during life is another strategy. Japan’s annual gift tax exemption is ¥1.1 million per recipient per year. Amounts above that threshold are taxed at rates from 10% to 55%, similar to estate tax. A parent transferring ¥10 million annually to two adult children over ten years can move ¥200 million out of the taxable estate while incurring minimal gift tax, assuming each annual transfer stays within or slightly above the exemption. However, gifts made within three years of death are clawed back into the estate for tax purposes, a rule extended to seven years under the 2023 reform for gifts made after January 2024.

Life insurance proceeds receive favorable treatment. The first ¥5 million per heir is exempt from estate tax, making life insurance a common vehicle for liquidity planning. A policyholder with three heirs can shield ¥15 million of death benefits from taxation.

Real estate planning has become more complex under the 2026 valuation rules. The previous strategy of purchasing high-value condominiums to compress estate value is no longer reliable. Some advisors now recommend shifting to income-producing assets outside Japan or restructuring ownership through foreign entities, though such structures must be carefully documented to avoid anti-avoidance provisions in the tax code.

A common pitfall for foreign nationals is misunderstanding the residency threshold. A foreign executive on a three-year assignment in Tokyo who dies in year two is subject to worldwide estate tax, even if they maintained a primary residence abroad. Another frequent error is failing to file a return when required. Even if no tax is due after exemptions, a return must be filed to claim those exemptions. Failure to file can result in disallowance of the spousal exemption and imposition of the full tax.

For context on ongoing property tax obligations that affect estate valuation, see Property tax Japan rates and fees: 2026 complete guide.

Cross-Border Considerations and Treaty Relief

Japan has estate and gift tax treaties with only a handful of countries, including the United States. The U.S.-Japan estate tax treaty, in force since 1955, provides relief from double taxation by allowing a foreign tax credit for Japanese estate tax paid on U.S.-situs assets, and vice versa. For American citizens or green card holders who are also Japanese residents, this treaty prevents the same asset from being taxed twice at the top rates of both jurisdictions.

Countries without treaties, including the United Kingdom, Australia, and most of the European Union, offer no formal relief. A British national resident in Tokyo who dies owning both a London flat and a Tokyo マンション may face estate tax in Japan on the worldwide estate and inheritance tax in the U.K. on the London property, with no credit mechanism to offset the dual levy. In such cases, careful estate planning, including the use of trusts or holding companies, may be necessary to mitigate exposure.

Foreign heirs should also be aware of their home country’s inheritance tax rules. The U.K., for example, imposes inheritance tax on the worldwide estates of U.K. domiciliaries at a flat rate of 40% above a £325,000 threshold. A U.K. citizen who inherits a ¥400 million Tokyo property from a parent may owe Japanese estate tax as a resident heir and U.K. inheritance tax as a U.K. domiciliary, with limited relief.

Currency repatriation is another practical concern. Estate tax must be paid in Japanese yen. If the estate’s assets are primarily real property, heirs may need to sell or borrow against the property to generate the cash needed for payment. Tokyo real estate transactions typically take 60 to 90 days from listing to closing, which can create timing pressure within the ten-month filing window. Some heirs arrange bridge financing through Japanese banks, though non-resident heirs may face difficulty securing such loans without a domestic guarantor.

Closing

Koukyuu is a private buyer’s advisory for distinguished Tokyo residences in Minato-ku (港区), Shibuya-ku (渋谷区), and Chiyoda-ku (千代田区), focused exclusively on transactions of ¥300 million and above. A licensed 宅建士 (takken-shi, Japan’s statutory real estate transaction specialist) personally handles every stage of the engagement, from the first consultation to the signing, a continuity most Tokyo agencies do not offer. Book a private consultation) to begin.