Trains then reverse to the other siding, change direction again, and enter the main line toward Shigetō.

[2] Shinkai Signalbox (新改信号場) opened on 28 November 1935, and was converted to a passenger station on 1 June 1947.

In preparation for the US invasion of the Japanese home islands, the area around Shinkai Signalbox was designated as a key point for the line of communication and was made into a military fortress.

As the mountainous area was deemed a natural fortress, important facilities such as the Shikoku Military District Headquarters were temporarily established here.

[3] With the privatization of Japanese National Railways (JNR) on 1 April 1987, the station came under the control of JR Shikoku.