• On 12 November 1976, the company was established as a wholly owned
subsidiary of the Oriental Land Company and the Oriental Land Transport Co., Ltd. • On 1 April 1977 the company commenced operating route No.1 between
Urayasu Station Iriguchi and Maihama Shako. • On 1 December 1988 the
Keiyo Line was partially opened between
Minami-Funabashi Station and
Shin-Kiba Station. The company established new bus routes and bus stops at
Maihama Station and
Shin-Urayasu Station. • On 1 August 1989 the company was renamed Tokyo Bay City Koutsu following its acquisition by
Keisei Electric Railway. • On 4 April 1996 the original Urayasu Terminal closed, replaced by Urayasu Station bus stop in front of Urayasu Station. ==Office==