Hachiōji is a city located in the western portion of Tokyo Prefecture, Japan. As of 31 March 2021, the city had an estimated population of 561,344, and a population density of 3,000 persons per km2. The total area of the city is 186.38 km2 (71.96 sq mi).

Keio Corporation is a private railway operator in Tokyo, Japan, and the central firm of the Keio Group that is involved in transport, retail, real estate and other industries.