Japan is known for its peaceful temples and tranquil gardens, but its high level of urbanisation has made it a very noisy country. A 2018 report by the World Health Organization ranked Japan as the noisiest country in the world, prompting the Japanese government to take action. Noise pollution can cause various health problems, including hearing loss, cardiovascular disease, and sleep disturbance. The Japanese government has implemented strict noise regulations to protect its citizens' health and well-being and maintain its reputation as a peaceful and quiet place.

Japan's primary legislation governing noise regulation is the Environmental Noise Regulation Act, first introduced in 1986 and subsequently amended in 1999. This act sets different noise limits for different times of the day, with the maximum allowable noise level during the day set at 55 decibels and reduced to 45 decibels at night to prevent disturbances to those who are sleeping. Violators of these standards are subject to penalties.

In addition to the Environmental Noise Regulation Act, there are other laws and regulations related to noise in Japan. The Road Traffic Act regulates the noise levels of vehicles, and the Building Standards Act contains provisions for the sound insulation of buildings. These regulations have contributed to the decline in noise levels of cars and buildings, as seen in the bar graph below, which shows the vehicle traffic and noise levels in Japan from 1971 to 2001.

The Japanese government is taking many measures to combat noise pollution. It enforces strict regulations on noise levels in residential and commercial areas and implements noise-reducing measures in public spaces, such as sound barriers along highways and sound-absorbing materials on building exteriors. 

It promotes the use of quiet transportation modes, such as electric and hybrid vehicles, and encourages the development of low-noise infrastructure, such as soundproofed train tracks. The government invests in research and development of noise-reducing technologies, such as innovative soundproofing materials and noise-cancelling devices. It also educates the public on the impacts of noise pollution. It encourages individuals to reduce noise in their lives by using earplugs or avoiding loud activities near residential areas. 

The Japanese government collaborates with other countries and organisations to share best practices and develop international standards for reducing noise pollution. Noise pollution is a serious issue in Japan, but the government is taking steps to combat it. By enforcing strict regulations, implementing noise-reducing measures, promoting the use of quiet transportation modes, investing in research and development, educating the public, and collaborating with other countries and organisations, Japan is working to protect the health and well-being of its citizens and maintain its reputation as a peaceful and quiet place.