It connects Yoshimatsu Station in Yūsui, Kagoshima Prefecture with Miyakonojō Station in Miyakonojō, Miyazaki Prefecture.

Between 1916 and 1923 this line was part of the original rail connection from Kokura to Miyazaki, until the opening of the Nippo Main Line.

The Yoshimatsu–Kobayashi section opened in 1912, and was extended to Miyakonojo the following year.

Construction continued east and opened to Miyazaki in 1916, with the line formally named the Miyazaki Main Line in 1917.

This article about a Japanese railway line–related topic is a stub.