The route between Teranouchi and Marutamachi was established as a part of the route for the Kyoto City Bus 25 series until January 27, 1964, and was also the route between Imadegawa and Marutamachi which was established until March 29, 1981 when the series was abolished.
1964年1月27日までは京都市営バス25号系統の運行経路の一部として寺之内⇔丸太町間、また1981年5月29日の系統廃止までは今出川⇔丸太町間が設定されていた。