However, there remain bus routes operated by private bus companies or by JR Bus because, when Kyoto City tried to integrate the bus operations, Keihan Jidosha (now Keihan Bus Co., Ltd.), Nara Electric Railway (now Kintetsu Bus Co., Ltd.), Ujitawara Jidosha (now Keihan Bus Co., Ltd.), all of which were involved in the integration in the Osaka City area, and Tanba Kotsu (now Keihan Kyoto Bus), which was involved in the integration in the Tango region, were not included in the targets for the integration; moreover, the Railway Ministry-operated bus was out of consideration for integration in wartime.
ただし、現在でも京都市内に民営バス会社やJRバスによる路線が残存しているのは、この統合時に大阪市域の統合に絡む京阪自動車（現京阪バス）、奈良電気鉄道（現近鉄バス）、宇治田原自動車（現京阪バス）と、丹後地方の統合に絡む丹波交通（現京阪京都バス）が統合対象でなかったこと、省営バスはそもそも戦時統合の対象外であったことによるものである。