JapanWhat is a boundary determination lawsuit?
A boundary determination lawsuit is a civil action filed in Japanese district court to legally establish the exact location of a property boundary between neighboring landowners.
What the Law Says
Japanese law provides no standalone 'boundary determination lawsuit' statute, but such cases are brought under general civil procedure to resolve disputes over real property boundaries, relying on provisions in the Civil Code and the Real Property Registration Act.
Boundary determination lawsuits fall under civil litigation governed by the Code of Civil Procedure. They seek a judicial declaration confirming where the boundary line lies between two adjacent plots of land.
The Civil Code establishes rights and obligations related to land ownership and use. Article 240 states: 'The owner of land may, within the limits of the law, freely use, profit from, and dispose of his property.' This includes the right to assert and protect boundary lines.
The Real Property Registration Act requires accurate registration of land boundaries. Article 49 states: 'When a change occurs in the boundaries of a registered plot of land, the person concerned must apply for registration of the change without delay.' Disputes often arise when registrations are inconsistent or outdated.
Statutory TextThe owner of land may, within the limits of the law, freely use, profit from, and dispose of his property.
— Civil Code, Art. 240 — Ownership Rights
Statutory TextWhen a change occurs in the boundaries of a registered plot of land, the person concerned must apply for registration of the change without delay.
— Real Property Registration Act, Art. 49 — Duty to Register Boundary Changes
What to Do
Confirm current land registry records (tokibo-to) at the Legal Affairs Bureau.
Obtain certified survey maps and consult a licensed land surveyor (kenchikushi).
Attempt mediation through the Legal Affairs Bureau’s land boundary dispute resolution service.
If unresolved, file a petition for boundary determination with the competent District Court.
Submit evidence including registry extracts, survey reports, historical usage records, and witness statements.
Sources
Not legal advice. This article is general information based on publicly available sources, written for educational purposes. Laws change and individual situations vary. Consult a licensed attorney in your jurisdiction before acting on anything you read here. Last reviewed: 2026-06-08.