 The 1 km section from Miyajidake to Tsuyazaki opened in 1951, and in 1954 the line was re-gauged to and connected to the Fukuoka line.The line was grade separated over the JR Kashii Line at Wajiro Station in 1966, and CTC signalling was commissioned in 1978.In 1986, the Shinhakata to Kaizuka section was closed and replaced by the Fukuoka City Subway Hakozaki Line.