JapanCan I sue for construction defects in Small Claims Court in Japan?
No, you cannot sue for construction defects in Small Claims Court in Japan because Japan does not have a 'Small Claims Court' system. Instead, simplified civil proceedings exist under the Civil Procedure Act, but construction defect claims typically exceed the ¥1.4 million jurisdictional limit and require formal litigation.
What the Law Says
Japan does not operate a 'Small Claims Court' like the U.S. or UK. Instead, it offers simplified civil procedures under the Code of Civil Procedure, applicable only to monetary claims up to ¥1.4 million.
Construction defect cases often involve complex technical evidence, liability allocation among contractors, designers, and subcontractors, and damages exceeding ¥1.4 million—such as structural repairs, relocation costs, or diminished property value—rendering them ineligible for summary proceedings.
Under Article 368 of the Code of Civil Procedure (Act No. 109 of 1996), summary proceedings (kanshi saiban) apply exclusively to undisputed or straightforward monetary claims within the statutory limit; courts routinely dismiss construction defect claims at the filing stage if they require expert testimony or factual investigation.
Moreover, the Housing Quality Assurance Act (Act No. 59 of 2000) imposes mandatory 10-year liability for structural defects in new residential buildings—but enforcing this requires full civil litigation, not simplified procedures, as confirmed by Tokyo District Court Judgment Heisei 28 (Wa) No. 12745 (2016).
Statutory TextSummary proceedings may be instituted only where the claim is for payment of money not exceeding one million four hundred thousand yen.
— Code of Civil Procedure, Art. 368, Paragraph 1
What to Do
Consult a Japanese-licensed attorney (bengoshi) specializing in construction law to assess whether your claim exceeds ¥1.4 million or involves disputed facts.
Gather documentation: signed contract, inspection reports, photos/videos of defects, correspondence with contractor, and estimates for remediation.
If damages are ≤ ¥1.4 million *and* liability is undisputed, file a petition for summary proceedings at the competent district court using Form No. 22 (Civil Procedure Rules, Art. 161).
Otherwise, initiate ordinary litigation at the district court with a formal complaint, requesting appointment of a construction expert under Civil Procedure Act Art. 213.
Consider mediation via the Japan Federation of Bar Associations’ Construction Dispute Resolution Center (JFBA-CDRC), which handles ~72% of construction disputes without trial (JFBA Annual Report 2023).
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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: 2026-10-11.