Japan Inheritance Tax: The Complete Guide for Foreigners and Overseas Heirs

If you own assets in Japan, you are a foreigner living in Japan, or you expect to inherit from a relative connected to Japan, one fact reshapes everything you think you know about estate planning:

Japan taxes the heir, not the estate.

That single difference — invisible if you only know the US or UK systems — changes who files, who pays, and how much. This guide walks through Japan’s inheritance tax (相続税, sōzoku-zei) the way a financial planner would explain it to an international client: in plain English, grounded in the National Tax Agency’s own rules, and focused on the situations foreigners and overseas heirs actually face.

This is general information, not advice. Tax rules change and your situation is unique. The figures here are current as of 2026 and cited to Japan’s National Tax Agency (NTA). Always confirm with a licensed zeirishi (tax accountant) before acting.

The mental model: heir-based, not estate-based

In the United States, the estate pays federal estate tax before anything reaches the beneficiaries. Japan inverts this. The taxable amount is computed across the whole estate, but the liability attaches to each heir based on what they receive.

The practical consequences are large:

• An overseas heir can have a Japanese filing obligation even when other heirs do not.
• “Splitting” an estate among more heirs raises the tax-free threshold (more on this below) — the opposite instinct from estate-tax planning.
• The spouse enjoys an enormous credit, so who inherits what is itself a planning lever.

Keep this model in mind; every section below is a consequence of it.

Step 1 — Are you even in scope? Taxpayer categories

Whether your worldwide assets or only your Japan-situated assets are taxed depends on a residence-and-nationality matrix. Simplified to what matters for most international readers:

Two rules drive most foreign cases:

1. The 10-year jūsho lookback. A Japanese-national heir living abroad is still taxed on worldwide assets if they held an address (jūsho) in Japan at any point within 10 years before the death. Leaving Japan does not instantly switch off worldwide exposure.
2. The “temporary foreigner” relief (2021 reform). A foreign national who holds a Table-1 visa (work, study, etc. under the Immigration Control Act) and has lived in Japan for 10 years or less out of the past 15 is treated as a temporary resident foreigner — taxed only on Japan-situated assets. Where both the deceased and the heir are such Table-1 foreigners, overseas assets fall out of scope entirely. This is the key relief for seconded expat employees and their families.

Because the full grid is statutory, confirm your exact category. The NTA’s consumer summary for heirs living abroad is No.4138, with the gift-side parallel at No.4432.

Step 2 — The basic exclusion (how much passes tax-free)

Japan’s tax-free floor is a formula, not a flat number:

Basic exclusion = 30,000,000 yen + (6,000,000 yen × number of legal heirs)

So a spouse and two children — three legal heirs — give a 48,000,000 yen exclusion. If the total taxable estate is at or below the exclusion, there is generally no inheritance tax and no filing requirement. (Source: NTA No.4152.)

Notice the heir-based logic again: more legal heirs means a higher threshold. The count uses legal heirs under the Civil Code, in this order of priority after the always-included spouse: ① children → ② parents/grandparents → ③ siblings (NTA No.4132).

Step 3 — The rate table and how tax is actually computed

Japan’s rates are progressive from 10% to 55%. But you do not simply apply them to one heir’s inheritance. The NTA method is:

1. Subtract the basic exclusion from the total taxable estate.
2. Split the remainder across heirs by their statutory shares.
3. Apply the rate table to each notional share.
4. Sum those amounts to get the total household tax.
5. Re-allocate that total to heirs in proportion to what they actually receive.

The per-share quick-calculation table (NTA No.4155):

Worked example

Suppose a parent dies leaving a taxable estate of 200,000,000 yen, with a spouse and two adult children.

• Heirs: 3 → basic exclusion = 30M + 18M = 48,000,000 yen.
• Taxable after exclusion: 200M − 48M = 152,000,000 yen.
• Statutory shares: spouse 1/2 (76M), each child 1/4 (38M).
• Tax on each notional share:
  • Spouse 76M → 76M × 30% − 7M = 15,800,000
  • Each child 38M → 38M × 20% − 2M = 5,600,000 (×2 = 11,200,000)
• Total household tax = 27,000,000 yen, then re-allocated by what each heir actually inherits.

Before anyone pays, however, the spouse credit usually transforms the result.

Step 4 — The spouse credit (often decisive)

A surviving spouse owes no inheritance tax up to the greater of (a) 160,000,000 yen or (b) the spouse’s statutory share (NTA No.4158). In the example above, the spouse’s 76M portion sits well under 160M, so the spouse’s slice of the tax is eliminated — but a return must still be filed to claim it.

A common planning tension follows: loading everything onto the spouse minimizes tax now but can inflate tax on the second death (when the spouse credit is gone and the estate passes to children). Cross-border families should model both deaths together.

Step 5 — Gift tax and the 2024 reforms

Lifetime giving in Japan runs on two mutually exclusive tracks, and the rules changed materially in 2024.

Track 1 — Annual taxation (暦年課税). A recipient can receive up to 1,100,000 yen per calendar year tax-free; amounts above are taxed on a 10%–55% scale (NTA No.4408). The 2024 reform extended the add-back period from 3 years to 7 years: gifts made within 7 years before death are pulled back into the taxable estate (with a one-time 1,000,000-yen deduction on the extra years 4–7). The full 7-year reach phases in for deaths from 2031 onward (NTA reform PDF).

Track 2 — Early-inheritance settlement (相続時精算課税). For a donor aged 60+ giving to a descendant aged 18+, this elective system offers a 25,000,000-yen lifetime special deduction (a flat 20% applies above it). The 2024 reform added a new, separate 1,100,000-yen annual deduction — and crucially, amounts within that annual deduction are not added back to the estate at death (NTA No.4103). For many families, this makes Track 2 newly attractive for steady annual transfers.

Step 6 — Cross-border: avoiding double tax

The nightmare scenario is paying tax twice on the same asset. Two mechanisms help:

• Treaty relief. Japan and the United States maintain a dedicated estate, inheritance, and gift tax convention (signed 1954, separate from the income-tax treaty) that allocates taxing rights and provides credits (IRS estate & gift tax treaties).
• Foreign tax credits. Where no treaty applies, domestic foreign-tax-credit rules in each country may still relieve part of the double charge.

The interaction of situs rules, residency, and credits is where most expensive mistakes happen. This is the one area where DIY is genuinely risky — engage a cross-border specialist.

Step 7 — Deadlines and the digital-asset blind spot

The return and payment are due within 10 months of the day after the death (NTA No.4205). For overseas heirs, gathering Japanese documents, obtaining a koseki trail, and arranging payment from abroad can consume that window quickly.

There is also a modern trap that sits squarely at the intersection of financial planning and security: digital assets. Japanese crypto holdings, online brokerage balances, and even points/miles are part of the taxable estate — but heirs frequently cannot find or access them. Keys die with the holder; 2FA locks out the family; exchanges demand documents the heirs don’t have. Protecting and documenting digital assets is itself an estate-planning task, and one we cover from the security side on our Security media. A simple, encrypted “digital estate inventory” is one of the highest-leverage moves an internationally mobile family can make.

Where to go next

• New here? Start at the Financial Planning blog index.
• Worried about access and theft of online accounts and crypto? See our Security media for the protection side of the same coin.

Sources

• National Tax Agency — Inheritance tax calculation (No.4152): https://www.nta.go.jp/taxes/shiraberu/taxanswer/sozoku/4152.htm
• National Tax Agency — Inheritance tax rates (No.4155): https://www.nta.go.jp/taxes/shiraberu/taxanswer/sozoku/4155.htm
• National Tax Agency — Spouse tax credit (No.4158): https://www.nta.go.jp/taxes/shiraberu/taxanswer/sozoku/4158.htm
• National Tax Agency — Scope of heirs & statutory shares (No.4132): https://www.nta.go.jp/taxes/shiraberu/taxanswer/sozoku/4132.htm
• National Tax Agency — Heirs living abroad (No.4138): https://www.nta.go.jp/taxes/shiraberu/taxanswer/sozoku/4138.htm
• National Tax Agency — Gift tax, annual taxation (No.4408): https://www.nta.go.jp/taxes/shiraberu/taxanswer/zoyo/4408.htm
• National Tax Agency — Early-inheritance settlement system (No.4103): https://www.nta.go.jp/taxes/shiraberu/taxanswer/sozoku/4103.htm
• National Tax Agency — Filing and payment (No.4205): https://www.nta.go.jp/taxes/shiraberu/taxanswer/sozoku/4205.htm
• National Tax Agency — 2024 reform overview (PDF): https://www.nta.go.jp/publication/pamph/pdf/0023006-004.pdf
• IRS — Estate & gift tax treaties (incl. Japan): https://www.irs.gov/businesses/small-businesses-self-employed/estate-gift-tax-treaties-international

Confirmed against NTA sources on 2026-06-29.