What legal options do I have for apartment noise from neighbors in Japan?

40–50 dB
Maximum permissible daytime noise level in residential areas under Tokyo Metropolitan Ordinance
30 days
Typical timeframe for local government to respond to noise complaints under the Environmental Conservation Ordinance
The Short Answer

In Japan, you can request neighbor noise reduction under the Civil Code and local ordinances; if unresolved, file a complaint with local government or sue for damages or injunction.

What the Law Says

Japanese law treats excessive neighbor noise as a potential violation of civil rights and environmental regulations. While there is no national 'noise act,' protections arise from multiple legal sources including civil liability, local ordinances, and administrative enforcement.

Under Article 709 of the Japanese Civil Code, a neighbor causing unreasonable noise may be liable for damages if it interferes with your peaceful enjoyment of property. Courts have recognized chronic loud noise (e.g., late-night shouting, repeated heavy footsteps, or amplified music) as actionable nuisance behavior.

Local governments enforce noise limits through ordinances like the Tokyo Metropolitan Ordinance on Environmental Conservation (Ordinance No. 128 of 1971), which sets daytime noise limits at 40–50 dB in residential zones and stricter nighttime limits (typically 35–40 dB). Violations can trigger administrative guidance or orders.

The Building Standards Act (Act No. 201 of 1950) also requires landlords and tenants to maintain buildings in a manner that prevents 'harmful interference' with neighboring occupants (Article 92-2, Enforcement Regulations). Though not directly enforceable by individuals, it supports claims in civil litigation.

Statutory Text

A person who, by unlawful act, causes damage to another's rights or legally protected interests shall be liable to compensate for such damage.

— Civil Code, Article 709
Statutory Text

The Governor may order a person causing environmental pollution… to take measures to prevent or reduce such pollution.

— Tokyo Metropolitan Ordinance on Environmental Conservation, Article 26

What to Do

1

Politely speak with your neighbor first—many issues resolve informally and preserve relationships.

2

Document the noise (dates, times, duration, decibel estimates using free apps like Sound Meter, and witness statements) for future use.

3

Contact your landlord or management company—they have contractual and statutory duties to address tenant disturbances under the Act on Land and Building Leases (Article 31).

4

File a formal complaint with your municipal ward office (e.g., Tokyo’s Environmental Conservation Division) or the Prefectural Environmental Protection Office—they can conduct on-site measurements and issue advisories.

5

If noise persists and causes demonstrable harm (e.g., sleep deprivation, health issues), consult a lawyer to send a certified demand letter or file a civil suit seeking injunction and/or damages under Civil Code Articles 709 and 710.

Sources

Tokyo Metropolitan Government – Environmental Conservation DivisionMinistry of Land, Infrastructure, Transport and Tourism – Building Standards ActJapan Civil Code (English Translation)

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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.