Keio Corporation is a major Japanese transportation company based in Tokyo. Founded in 1906, it operates a network of railways, buses, and other transportation services, primarily in the Kanagawa Prefecture and Tokyo. The company is known for its Keio Line, which connects central Tokyo to the suburbs. In addition to transportation, Keio Corporation is involved in various businesses, including real estate, retail, and education. The company owns and operates several shopping centers and educational institutions, contributing to its diverse portfolio and economic impact in the region.