JapanHow do I file a noise complaint against a neighbor in Japan?
Contact your local municipal office or police (110) for immediate disturbances; formal complaints require documentation and may lead to mediation or enforcement under the Noise Regulation Act.
What the Law Says
Japan regulates neighborhood noise primarily through national ordinances and local ordinances enacted under the Basic Environment Law and the Environmental Impact Assessment Act. Municipal governments have broad authority to set stricter standards than national guidelines, especially for residential areas.
The primary national framework is the 'Ordinance on the Regulation of Noise in Residential Areas' (Environmental Agency Ordinance No. 29 of 1996), which sets daytime noise limits at 55 dB(A) and nighttime limits at 45 dB(A) measured at the boundary of neighboring properties. Local governments—including all 23 special wards of Tokyo and major cities like Osaka and Nagoya—enact their own ordinances that often mirror or tighten these standards.
Under Article 25 of the Basic Environment Law (Law No. 91 of 1993), municipalities must 'take necessary measures to prevent environmental pollution, including noise, and ensure healthy living environments.' This empowers city offices to investigate complaints and issue guidance or orders.
Persistent noise violations may constitute 'disturbing the peace' under Article 1, Paragraph 1 of the Minor Offenses Act (Law No. 14 of 1948), punishable by up to 30 days detention or a fine of up to ¥10,000—but prosecution requires police discretion and strong evidence.
Statutory TextNoise levels in residential areas shall not exceed 55 decibels during the day (6 a.m. to 10 p.m.) and 45 decibels at night (10 p.m. to 6 a.m.).
— Environmental Agency Ordinance No. 29 of 1996, Article 3
Statutory TextMunicipalities shall take necessary measures to prevent environmental pollution and protect citizens’ health and living environments.
— Basic Environment Law, Law No. 91 of 1993, Article 25
What to Do
Politely speak with your neighbor first—many issues resolve informally and preserve relationships.
Document the noise: record dates, times, duration, decibel estimates (using free apps like SoundMeter), and descriptions; keep a written log for at least one week.
Contact your local ward or city office (e.g., Tokyo’s Shinjuku Ward Environmental Division) via phone or online form—most municipalities offer multilingual support and accept complaints without naming the neighbor initially.
If noise poses immediate danger or involves threats/violence, call police at 110; for non-urgent but persistent cases, file a formal complaint with your municipal environmental or public health department.
Request mediation through the municipal Community Mediation Center (Chōnaikai or Machizukuri Center)—free, confidential, and legally supported under the Act on Promotion of Settlement of Civil Disputes (Law No. 151 of 2004).
Sources
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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.