Japan Will Probate Process — Holographic vs Notarial Wills

If someone died in Japan and left a will, the type of will determines whether you spend months in Family Court or proceed directly to asset distribution. Japan doesn't have the Common Law probate system used in the US, UK, or Australia — there's no court-appointed executor who gathers assets, pays debts, and distributes the remainder. Instead, heirs inherit everything automatically at the moment of death, and the will determines how they divide it.

The critical question is whether the will is holographic or notarial.

Holographic Wills (Jihitsu Shosho Igon)

A holographic will in Japan must be entirely handwritten, dated, signed, and sealed by the testator. No typed or printed content. No witnesses required at the time of writing.

The problem: when the testator dies, the will cannot be used immediately. Under Article 1004 of the Civil Code, the custodian must submit the holographic will to the Family Court for a mandatory verification process called kenpin. This is not a ruling on whether the will is valid — it's a formal inspection to confirm the document hasn't been tampered with. The court opens the will, records its physical condition, and notifies all statutory heirs.

The kenpin process requires:

• Filing a petition at the Family Court where the deceased was last domiciled
• Notification of every statutory heir (even those disinherited by the will)
• A court hearing date, typically several weeks to months out
• The original will — copies are not accepted

Until kenpin is completed, banks and the Legal Affairs Bureau will refuse to process any asset transfers based on the will. This creates a bottleneck that can freeze estate settlement for months.

One exception: If the holographic will was deposited at the Legal Affairs Bureau (Homukyoku) before the testator's death under the will deposit system introduced in 2020, kenpin is waived. The deposited will can be retrieved and used immediately.

Notarial Wills (Kosei Shosho Igon)

A notarial will is prepared by a Japanese notary public (Koshonin) in Japanese. The testator dictates the contents to the notary in the presence of at least two independent witnesses. The notary drafts the document, reads it aloud, and secures signatures and seals from everyone present.

The advantage: notarial wills are completely exempt from the kenpin process. The moment the testator dies, the executor named in the will can walk into a bank or the Legal Affairs Bureau and begin processing transfers immediately. Notarial wills are permanently stored at the notary office and are searchable nationwide through Japan's notary network — meaning a family can verify whether a notarial will exists even if they don't know which notary prepared it.

For international families, notarial wills eliminate the single biggest source of delay in Japanese estate settlement.

Foreign Wills and Their Limits

If the deceased made a will in their home country (a US or UK will, for example), the situation gets complicated. Japanese administrative agencies and land registries generally do not accept foreign probate certificates directly. A US probate court order granting authority to an executor has no automatic legal force in Japan.

For movable assets (bank accounts, securities), the applicable law depends on the deceased's nationality under Japan's Act on General Rules for Application of Laws. For real estate, Japanese law applies under the lex situs doctrine — meaning Japanese inheritance rules govern property physically located in Japan regardless of what a foreign will says.

In practice, foreign heirs usually need either a notarized affidavit executed before a Japanese consulate or a separate Japanese court judgment recognizing the foreign disposition.

Power of Attorney and Estate Administration

Japan doesn't have the Common Law concept of a personal representative or estate administrator who manages everything. Instead:

• If there's a will naming an executor (Yuigon Shikkousha): The executor has authority to carry out the will's terms, including bank transactions and property registration
• If there's no will or no named executor: All statutory heirs must act collectively, signing an Inheritance Division Agreement (Isan Bunkatsu Kyogisho) with unanimous consent

When an overseas heir cannot be physically present in Japan, they can execute a power of attorney (Inin-Jo) authorizing a representative in Japan to act on their behalf. This document must typically be notarized by a public notary in the heir's country of residence and may require apostille certification for use in Japan.

If heirs cannot agree on division, or if an heir cannot be located, the Family Court can appoint an Estate Administrator (Isan Kanrinin) to manage and distribute the assets. This is a formal legal proceeding that takes months and involves court fees.

What This Means for Foreign Families

The practical takeaway: if your family member in Japan had a notarial will, the estate settlement path is dramatically smoother. If they had a holographic will, budget several extra months for kenpin. If they had no will at all, every single statutory heir worldwide must agree and sign before anything moves.

The Japan Death Guide for English Speakers includes the complete will verification flowchart, model power of attorney language for overseas heirs, and the Inheritance Division Agreement template — covering all three scenarios in sequence.

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