Similar problems exist on another Kyoto Municipal Subway line: between Takeda Station (Kyoto Prefecture) and Kyoto Station, either the Karasuma Line of Kyoto Municipal Subway or the Kintetsu Kyoto Line which runs directly into the subway line via Takeda Station, is available, but their fares are different (in this case, the fare for the subway line is costly and fare-related announcements are made within the trains cars operated by the subway).
なお、京都市営地下鉄では他にも、京都市営地下鉄烏丸線と、竹田駅(京都府)を介して同線と直通運転する近鉄京都線においても、京都駅～竹田間の運賃不整合の問題が起きている（尤も、こちらは地下鉄の方が高額になるため、地下鉄直通列車側で運賃に関する車内アナウンスがある）。