It is owned and operated by West Nippon Expressway Company.

It is signed as E27 under the Ministry of Land, Infrastructure, Transport and Tourism's "2016 Proposal for Realization of Expressway Numbering.

The route of the expressway connects the coastline of the Japan Sea and the greater Osaka urban area by traversing the mountainous interior of the Kinki region.

The first section of the expressway was opened to traffic in 1987 and the entire route was completed in 2014.

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