Japan
Succession:
Tax:
Geographic
Forced heirship (iryubun), family court mediation, inheritance tax brackets, agricultural succession, relationshipCategory on IryubunClaim (spouse/child/lineal_ascendant/sibling), yoshi adoption → core kinship type mapping (futsu_yoshi/tokubetsu_yoshi), saishi custodial succession clarification
Japanese succession law — koseki records, iryubun (reserved share) claims, yōshi (adoption), spousal residence right (2019 reform), isan bunkatsu (estate division), saishi succession, local will formalities.
Maintained by
Testate Technologies Ltd
We're looking for a jurisdiction partner to co-maintain this extension — bringing local legal expertise while we handle the schema engineering. Get in touch →
Extension Fields
| Field | Type | Req | Description |
|---|---|---|---|
| inkanVerified | boolean | Whether the registered inkan (seal) was verified at the Legal Affairs Bureau. | |
| iryubunClaims | array | ||
| isanBunkatsu | object | Estate division agreement (遺産分割協議). Requires unanimous heir consent. | |
| kosekiRecords | array | ||
| legislativeChanges | array | ||
| localWillFormality | string | jihi_shosho = holographic (自筆証書). kosei_shosho = notarised (公正証書). himitsusho = secret will (秘密証書). | |
| notes | string | ||
| saishiSuccessor | string | Custodial succession to ancestral rites (祭祀承継) — family graves, Buddhist altar (butsudan), genealogy records. NOT inheritance of property. Not modelled as a kinship type. The designated successor may be any person, not necessarily an heir | |
| spousesResidenceRight | Spouses residence right | ||
| yoshiAdoptions | array |
Example Scenarios
3 case studies use this extension.
Nakamura Industrial Holdings
Cross-border family succession across six countries
Pendleton & Sons
Structured estate valuations and provenance for auction sales
Sakamoto Legal Office
Judicial scrivener handling koseki registration and estate division agreements for local families in Osaka
At a Glance
Get in touch
Have a question about Japan or want to contribute? We'd love to hear from you.
Subject: Jurisdiction Enquiry — Japan