April 1, 1916: The conventional express train (kyuko) was upgraded to a superior express (Sai-Kyuko) and started the operation of the express train that would stop only at major stations with intervals of 24 minutes.
1916年（大正5年）4月1日従来の急行を最急行に改称、主要駅停車の急行を24分間隔で運行開始。