JapanLandlord unilaterally raised rent. Must I accept?
No, you do not have to accept a unilateral rent increase unless it meets strict legal requirements under Japan’s Act on Land and Building Leases.
What the Law Says
Japanese law strictly limits a landlord’s ability to unilaterally increase rent during a fixed-term or periodic tenancy. Any increase must be both reasonable and procedurally valid.
Under the Act on Land and Building Leases (Law No. 109 of 1991), a landlord may not raise rent during the term of a lease unless both parties agree in writing — or unless the landlord petitions the court and obtains approval based on objective, reasonable grounds.
Even after the lease expires, if the tenant continues occupying with the landlord’s tacit consent (creating a statutory periodic tenancy), the landlord still cannot raise rent unilaterally. Any proposed increase must be justified by changes in market rent, property value, taxes, or other objective factors — and must not violate principles of good faith.
The landlord must give written notice at least 30 days before the proposed increase takes effect. If the tenant objects, the landlord must file a petition with the district court to seek judicial approval — the increase is not effective until the court rules in favor of the landlord.
Statutory TextA lessor may not unilaterally increase the rent during the term of a lease contract unless otherwise provided in the contract or permitted by law.
— Act on Land and Building Leases, s. 10 — Rent Adjustment
Statutory TextWhere a lessor seeks to increase rent after the expiration of the lease term, such increase shall require the consent of the lessee or an order of the court based on reasonable grounds.
— Act on Land and Building Leases, s. 32 — Renewal and Rent Revision
What to Do
Review your lease agreement for any rent adjustment clauses.
Require written notice from the landlord stating the amount, effective date, and objective reasons for the increase.
Object in writing within 14 days if the increase lacks reasonable grounds or proper notice.
If the landlord insists, they must file a court petition — you may attend the hearing and submit evidence (e.g., comparable rents, tax records).
Do not pay the increased amount until a court order is issued or you voluntarily agree in writing.
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.