Once the Keihan Keishin Line was connected to the Keihan Main Line and had a through train service, but they have been separated since the Keihan Main Line was made underground and the Keishin Line was partly abolished as the Tozai Line of the Kyoto Municipal Subway Line opened.
かつては京阪本線と接続され、直通列車もあったが、京阪本線の地下化と京都市営地下鉄東西線の開業に伴う京津線の部分廃止に伴い、現在は分断された形になった。