The Tokyo BRT (東京BRT) is a bus rapid transit system operated by Keisei Bus that was established on 8 July 2019. Tokyo BRT buses are parked at a building owned by Tokyo BRT and located in Shinonome, Kōtō. The network's two bases—Okuto Office and Shinonome Barn—are also used by Keisei Bus.

The Keisei Bus Co., Ltd. is a bus company within the Keisei Group. It was established on 1 October 2003 to inherit all business of the Keisei Electric Railway bus department.