March 25, 1968: The operation interval was revised from 15 minutes (express trains between Sanjo and Ishiyamadera, local trains between Sanjo and Hamaotsu) to 20 minutes (express trains between Sanjo and Ishiyamadera, local trains between Sanjo and Hamaotsu, local trains between Sanjo and Shinomiya) in order to make it consistent with that of the Keihan Main Line.
1968年（昭和43年）3月25日-運転間隔を15分毎（三条～石山寺急行、三条～浜大津普通）から20分毎（三条～石山寺急行、三条～浜大津普通、三条～四宮普通）に変更し、京阪線の間隔に合わせる。