On the other hand, the reason it wasn't extended up to Nijo Station was because the Kyoto Municipal Transportation Bureau would need to pay an extra fee for use of railway cars (the fee is required because only Keihan trains use the Tozai Line instead of providing mutual usage between the two organizations, so the Kyoto Municipal Transportation Bureau must pay the fee to Keihan Electric Railway one-sidedly, depending on the total travel distance), the enhancement of the electric power system on the ground would be needed, and the carrying capacity would be too much (there was little need to increase the number of trains for the section between Nijo and Kyoto Shiyakusho-mae).
一方、二条駅まで乗り入れなかったのは、京都市交通局にとって車両使用料がかさむこと（相互乗り入れではなく、京阪車両の東西線への片乗り入れのため、乗り入れ車両の延べ走行距離に応じた車両使用料を、京都市交通局が一方的に京阪電気鉄道に支払わなければならない）、地上側の電力設備の増強が必要なこと、輸送力が過剰になること（二条～京都市役所前間を増発する必要性に乏しい）などが理由である。