It is owned and operated by West Nippon Expressway Company.

The Chūgoku-Ōdan Expressway Onomichi Matsue Route is the official designation for the Sanyō Expressway between Onomichi Interchange and Hiroshima Junction, the Onomichi Expressway between Onomichi Junction and Miyoshi-Higashi Junction, and the Matsue Expressway between Miyoshi-Higashi Junction and Matsue Interchange (concurrent with the Chūgoku-Ōdan Expressway Onomichi Matsue Route).

The route originates from its junction with the Sanyō Expressway and extends northward.

The route is 2 lanes for its entire length, with some overtaking areas.

This article relating to the roads and highways in Japan is a stub.