In 1950, the predecessor of the line opened as an attraction ride called Fantasy Train (おとぎ列車, Otogi Ressha), running through the amusement area developed by Seibu Railway and its allies. Battery-powered locomotives were used at the time, running on 762 mm (2 ft 6 in) gauge track. In 1952, it legally became a train line, with the official name Seibu Yamaguchi Line. In 1984, the steam and battery powered railway closed, The next year, the new people mover line opened, mostly along the same route.