Iwaizumi Station was the terminus of the Iwaizumi Line, and was located 38.4 rail kilometers from the starting point of the line at Moichi Station.

[1] The station was absorbed into the JR East network upon the privatization of the Japanese National Railways (JNR) on 1 April 1987.

[1] Operations on the Iwaizumi Line were suspended from July 2010, due to a landslide, and the line was officially closed on 1 April 2014, owing to declining passenger use.

[3] The passenger figures for previous years are as shown below.

Below-mentioned bullet point summary are bus routes and destinations.