Keio Corporation (Keio) is a transport services provider in Japan, operating trains between Shinjuku and Hachioji and Tama. The group is also involved in developing and selling real estate properties, along the line, where it operates its train services. Its other business activities include construction of commercial and residential buildings, operation of bus services and merchandising. Keio carries out these businesses through 43 companies. The company is headquartered in Tokyo, Japan.