Keio Dentetsu Bus
 Keio Dentetsu Bus Co. Ltd. (京王電鉄バス株式会社 Keiō Dentetsu Basu Kabushiki-gaisha) is a core bus-operating company of the Keio Group which was established on February 1 2002 inherited business all of the Keio Electric Railway (present Keio Corporation) automobile operation division and started business on August 1 of the same year. It has four subsidiaries Keio Bus Higashi Co. Ltd. (京王バス東株式会社 Keiō Basu Higashi Kabushiki-gaisha) Keio Bus Chuo Co. Ltd.