What are the rules for neighbor construction noise in Japan?

75 dB
Maximum permissible noise level during daytime (7 a.m.–10 p.m.)
60 dB
Maximum permissible noise level during nighttime (10 p.m.–7 a.m.)
The Short Answer

In Japan, construction noise is regulated by local ordinances under the Noise Regulation Act (1968), with typical daytime limits of 75 dB and nighttime limits of 60 dB near residential areas.

What the Law Says

Japan regulates construction noise primarily through the Noise Regulation Act (Act No. 98 of 1968) and delegated authority to prefectural and municipal governments to set enforceable standards.

The Noise Regulation Act empowers local governments to designate 'noise regulation zones'—typically including residential areas—and establish legally binding decibel limits based on time of day and land use. These ordinances must comply with national guidelines but may be stricter depending on local conditions.

Most major cities—including Tokyo, Osaka, and Nagoya—enforce a maximum of 75 dB(A) between 7:00 a.m. and 10:00 p.m., and 60 dB(A) between 10:00 p.m. and 7:00 a.m., measured at the boundary of the nearest residential property.

Violations can result in administrative guidance, orders to suspend work, or fines under local ordinances; however, criminal penalties are rare unless repeated noncompliance occurs after official warnings.

Statutory Text

The governor of a prefecture may designate noise regulation zones and set standards for noise levels from construction work.

— Noise Regulation Act, Article 4

What to Do

1

Politely speak with the contractor or site supervisor to confirm work hours and noise mitigation efforts.

2

Check your local municipality’s official noise ordinance online (e.g., Tokyo Metropolitan Government’s Environmental Bureau website) for exact dB limits and complaint procedures.

3

If unresolved, file a formal noise complaint with your city or ward office’s environmental or public health division—many accept reports via phone, email, or in person.

4

Request an on-site noise measurement by municipal officials; this creates an official record and may trigger enforcement action.

5

As a last resort, consult a lawyer about civil remedies such as injunctions or damages under Article 709 of the Civil Code (tort liability for unlawful interference).

Sources

Noise Regulation Act (Act No. 98 of 1968)Tokyo Metropolitan Government Environmental Bureau – Construction Noise Guidelines

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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.