Kamagasaki has been a place name since 1922. An accurate count of occupants has never been produced, even in the national census, due to the large population of day laborers who lack permanent addresses. Daily life in Kamagasaki in the 1950s was photographed by Seiryū Inoue, who won the 1961 Newcomer's Prize awarded by the Japan Photography Critics' Society for "One Hundred Faces of Kamagasaki". It has the largest day laborer concentration in the country. 30,000 people are estimated to live in every 2,000 meter radius in this area, part of which has been in slum-like conditions until as recently as 2012, containing run-down housing structures and untidy streets.