Meanwhile, a subway line was originally planned to be constructed to extend the line into Kyoto City; however, due to the large investment of time and money involved in the construction work--and particularly due to the enthronement ceremony of Emperor Showa, which was scheduled to be held at the Kyoto Imperial Palace--a plan was made to build a temporary terminal station in a suburb (Sai-mura, Kadono-gun) of Kyoto City and to provide access from there to the downtown area using the Kyoto City Tram service or Kyoto City Bus service.
また、京都側では地下線によって市内に乗り入れる予定であったが、工事には時間と多大な費用を要すること、そして昭和天皇即位の礼が京都御所で催されることになっていたことから、暫定的に市の外れ、葛野郡西院村に駅を設置し、ここから京都市電・京都市営バスなどで市街地へアクセスさせることにした。