Minami-morimachi Station is served by the following two Osaka Municipal Subway lines.

The station was originally built with an island platform, but overcrowding prompted construction of a second platform (construction was completed on 10 October 1997).

There are two side platforms with two tracks on the first basement level.

The station opened on 24 March 1967, served by the Tanimachi Line.

The Sakaisuji Line platforms opened on 6 December 1969.