The line runs northward from Kami-Kumamoto Station on the Kagoshima Main Line, operated by JR Kyushu, terminating at Miyoshi Station.

Previously, the line ran as far as Kikuchi, Kumamoto, an onsen resort town.

However, ticket sales were replaced with road traffic on Japan National Route 387, and the section between Miyoshi and Kikuchi ceased operations on February 16, 1986.

Kita-Kumamoto Station has a passing loop for trains continuing on the Fujisaki Line Two types of passenger services run on the line.

[1][2] Busses operated by the Kumamoto Electric Railway connect Miyoshi with Kikuchi along the abolished track.