[4] The station, which is unstaffed, consists of two opposed side platforms serving two tracks.

Subsequently, the track of the then Yosan Mainline was extended westwards from Yawatahama and linked up with the Uwajima Line at Unomachi on 20 June 1945.

The Uwajima Line and its stations, including Shimo-uwa, then became part of the Yosan Mainline from that date.

With the privatization of JNR on 1 April 1987, control of the station passed to JR Shikoku.

[6][7] Media related to Shimo-Uwa Station at Wikimedia Commons Branches (via Uchiko Line)