Required Documents for Inheritance in Japan

Proof of Family Relationship

Since foreign nationals don't have a Japanese family register (戸籍), they must provide equivalent documents from their home country — birth certificates, marriage certificates, family register extracts, or affidavits.

Apostille or Consular Authentication

Foreign documents must be authenticated. Hague Convention members can use an Apostille. Non-member countries require consular legalization through the embassy/consulate.

Certified Japanese Translation

All foreign-language documents must be accompanied by a certified Japanese translation. Translation must include the translator's name, address, and certification statement.

Affidavit / Sworn Statement (宣誓供述書)

A sworn statement about family relationships and heir status, notarized at the consulate or a Japanese notary public. Often used when official family registers are unavailable.

Signature Certificate (サイン証明)

Foreign nationals without a registered seal in Japan can use a Signature Certificate issued by their embassy/consulate or a Japanese notary.