The Yamaguchi Line (山口線 Yamaguchi-sen) of Seibu Railway is a manually operated people mover that runs between Seibu-Yūenchi in Higashimurayama, Tokyo and Seibu-Kyūjōmae Station in Tokorozawa, Saitama in Japan. The line has an official nickname Leo Liner, after 'Leo', the hero of Kimba the White Lion, who is also the mascot of Seibu Lions baseball team. The line is the only people mover that is operated by major private railway companies.
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. On 762 mm gauge, Battery-powered locomotives were used at the time. In 1952, it legally became a train line, with the official name Seibu Yamaguchi Line. In 1984, Yamaguchi Line of then steam and battery powered railway closed, and mostly on the same route new people mover line opened in the next year.
- Length: 2.8 km / Approx. 1.7 mi.
- Stations: 3
- Track: single
- Electric: 750 V (three-phase)
All trains stop at all stations.
- 1: Seibuen Station on Seibu Seibuen Line is closer.
- 2: Also accessible from Seibu-Yūenchi Station.