Besides local trains, the Tsurugisan limited express service also stops at Sadamitsu.

Access to the island platform from the station building is by means of a level crossing and ramp.

[2][4][5] The station is unstaffed by JR Shikoku but a tenant has leased part of the building for office space and operates the ticket window (equipped with a POS ticket machine) as a kan'i itaku agent.

[6][7] Sadamitsu Station was opened on 25 March 1914 as one of several intermediate stations built when Japanese Government Railways (JGR) extended the track of the Tokushima Main Line from Awa-Yamakawa to Awa-Ikeda.

With the privatization of Japanese National Railways (JNR), the successor to JGR, on 1 April 1987, Sadamitsu came under the control of JR Shikoku.