Keihan Bus Co., Ltd., currently provides bus services on routes where the Tozai Line also provides services, such as a route between Sanjo-keihan Station/Kawaramachi Station (Kyoto Prefecture) and Yamashina Station, a route between Sanjo-keihan/Shijo-Kawaramachi and Nagitsuji Station/Ono Station/Rokujizo Station, and a route between Yamashina Station and Rokujizo Station.
現在、この京阪バスは、三条京阪駅・河原町駅(京都府)-山科駅、三条京阪・四条河原町-椥辻駅・小野駅・六地蔵駅、山科駅-六地蔵駅などで、東西線と競合する路線を走らせている。