Late-night noise hazards and the Tokyo Metropolitan Government's countermeasures in the 1960s

In 1960s Tokyo, late-night noise became a source of annoyance for urban-dwellers in residential areas. The problem was primarily due to young people who congregated around small food establishments eating and drinking. The situation led to the Tokyo Metropolitan Government to attempt to remove such small businesses through the 1969 Environmental Pollution Prevention Ordinance. However, the section of the ordinance dealing with late-night noise hazards was diluted by the political parties, who supported the interests of such businesses, hence failing to satisfy local residents who were victims of the problem.