With private railway companies, such as the Osaka Electric Tramway (currently Kinki Nippon Railway Company), expanding their networks from the Taisho era, the line gradually lost passengers to them.
大正時代から大阪電気軌道（現在の近畿日本鉄道）などの私鉄が並行して路線網を伸ばしてくると次第に利用客を奪われた。