to Motomachi-Chūkagai via the Tokyo Metro Fukutoshin Line, Tokyu Toyoko Line and Minatomirai Lines. (ST) Morning and evening reserved-seat services between and via the Tokyo Metro Fukutoshin Line, Tokyu Toyoko Line and Minatomirai Lines at weekends, and between and via the Tokyo Metro Yurakucho Line on weekdays. (LE) Ikebukuro to Seibu-Chichibu, trains named , , with supplementary limited express charge. Stations Local services are not shown, as they stop at all stations. O: stop; |: pass; ↑: pass (services run in one direction, towards Ikebukuro only); *: limited stop; ↓: boarding only towards Ikebukuro, alighting only towards Tokorozawa (weekdays) Notes: Rolling stock Seibu 001 series (Limited express services) Seibu 2000 series Seibu 4000 series Seibu 6000 series Seibu 9000 series Seibu 10000 series (Limited express services, until 13 March 2020) Seibu 20000 series Seibu 30000 series Seibu 40000 series (Since 2017) Tokyo Metro 10000 series Tokyo Metro 17000 series Tokyu 5000 series Tokyu 5050 series Tokyu 5050-4000 series Yokohama Minatomirai Railway Y500 series History The line opened 15 April 1915 as the (separate from the Musashino Line currently operated by JR East), by the then , the predecessor of the present Seibu Railway with the first section from Ikebukuro to Hannō. In 1922, electrification began in three stages from Ikebukuro, until reaching Hannō in 1925. In the late 1920s, a second track was added from Ikebukuro to Hōya Station, and in 1929 the line was extended to Agano Station, the present nominal end. On 25 March 1952, the line was renamed to the Ikebukuro line, and throughout the 1950s and 1960s, the 2-track section was extended in stages until reaching Kasanui yard in 1969. In 1969, the Seibu Chichibu Line was completed to Seibu-Chichibu Station to begin through operation from Ikebukuro; in 1989, bypass tracks were laid to the Chichibu Railway Main Line; and in 1998, through service via Seibu Yurakucho Line of Seibu to the Tokyo Metro's Yurakucho Line began to Shinkiba Station. In 2001, a second track of 350 m was built to complete the double-track section from Ikebukuro to Hannō. At the same time, the elevated 4-track section from Nerima-Takanodai to Nakamurabashi opened. This elevated 4-track section was extended to Nerima in 2003. Station numbering was introduced on all Seibu Railway lines during fiscal 2012, with Seibu Ikebukuro Line stations numbered prefixed with the letters "SI". From 10 September 2012, 10-car 5050-4000 series sets entered revenue service