Seibu Railway 101 system appeared to fit the opening in 1969 of (1969) Seibuchichibusen. 101 series of high-performance train adopted the new technology and various other equipped with a speed suppression brake and high-output motors suitable for traveling mountainous line of Seibuchichibusen is working together with limestone transport train to lead the E851 form electric locomotive However, air conditioning equipped vehicles appeared 1972 in (1972), was Yuki developed into a commuter train shape to represent the Seibu. New 101 system with minor changes and front design was born in 1979 in (1979), new paint color vehicle of yellow solid with beige window around was hi 1996 from (1996) appeared, 1999 ( Old paint color disappears before 1999), 101 initial system form active in the branch section later years due to the emergence of new-style vehicle, it disappeared in 2010 (2010). 101 and the system initial form that 1 was the yellow color of the new paint color, 2 both set top car of the new 101 system that was active is will be released simultaneously in the paint color of old and new.