[2] The station consists of two opposed side platforms serving two tracks at grade.

The platforms are connected by an elevated station building, which has a Midori no Madoguchi staffed ticket office.

[2] On 10 June 1946, Japanese Government Railways (JGR) opened the Kasuga Signal Box at the present location of the station.

With the privatization of JNR on 1 April 1987, JR Kyushu took over control of the station.

[5] Media related to Ōnojō Station at Wikimedia Commons This Fukuoka Prefecture railroad station-related article is a stub.