 From 27 January 2017, a new Semboku 12000 series EMU was introduced on "Semboku Liner" services.The section from Nakamozu to Izumigaoka opened on 1 April 1971, with double track and electrified at 600 V DC.The overhead line voltage was increased to 1,500 V DC from 7 October 1973, and the line was extended to Toga-Mikita on 7 December 1973.