Given the circumstances, some people are requesting that the line be operated at ten-minute intervals, like the Keihan Main Line, but it hasn't yet realized on the ground that the transportation capacity of the line has already increased from two-car train, 15-minute interval before the opening of the subway Tozai Line to the current four-car train, 15-minute interval, while the number of passengers has declined; the further increase of transportation capacity isn't feasible in view of the additional costs.
このため、京阪線と同じ10分間隔に増発するよう要望があるが、東西線開通前は2両編成・15分間隔だったのに比べて乗客が減少しているのに、輸送力は逆に4両編成・15分間隔と倍増しており、さらに輸送力を増やすと支出がかさむために実現していない。