Despite its name, for much of its length it is a very local line with mainly single track sections and no regular express services. The line was originally built in the 1890s by Kansai Railway (later under the Japanese Government Railways and Japanese National Railways) as an alternate route from south Osaka to Nara and Nagoya, but competition from the Kintetsu lines and declining ridership forced the line to become two commuter lines to Osaka and Nagoya respectively, with a less-used section in the middle.