The station building is a modern concrete structure which houses a ticket window and a waiting room.

There is also an exhibition area featuring artefacts, pictures and part of the roof of the old station building.

The roof exhibit has bullet marks caused by a strafing run against the station by a U.S. Lockheed P-38 Lightning fighter during the Second World War.

With the privatization of Japanese National Railways (JNR), the successor of JGR, on 1 April 1987, JR Kyushu took over control of the station.

[7] Media related to Onoshimo Station at Wikimedia Commons This Kumamoto Prefecture railroad station-related article is a stub.