The area has had a history of clashes between day laborers and law enforcement, so local authorities took extensive measures to carry out the latest action. Between 1961 and 2008, 24 riots occurred in the Kamagasaki district, resulting in many injuries and arrests. The causes of the clashes varied. Some homeless people were upset at being out of work and took out their frustrations against the government and police, whom they distrusted. In other cases, the day laborers railed against poor working conditions or the perceived arrogance of the work arrangers. The Airin general center was jointly built in 1970 by the central government, the Osaka prefectural and city governments, among others. The purpose of the center was to supervise the open labor market and recruit workers on the streets in response to the "first Nishinari riots" in 1961. The center had a space called "yoseba," where day laborers gathered for work assignments, and a hospital facility that provided free and low-cost medical care. The center has been called a symbol of Kamagasaki in part because it was a place where day laborers interacted with each other. However, the center was found to have problems with earthquake resistance. In 2016, a decision was made to temporarily relocate the center's labor facility, and to ultimately create a new building on the site. The center was closed in 2019.