the abolition of non-core lines. , Yoshiaki Tsutsumi remains a major investor in Seibu Holdings through his 36% investment in NW Corporation, the second-largest shareholder in the company with a share of around 15%. Tsutsumi refused to respond to the Cerberus tender offer at the urging of Seibu management. Railway operations As of June 2017, Seibu's routes total . They fall into two separate groups. Tokorozawa Station is the crossing point of Ikebukuro Line and Shinjuku Line. Seibu Railway is well known for its bright yellow colored trains. However, more recent trains have a blue colored line on unpainted stainless steel or aluminium bodies. Ikebukuro Line Group The Ikebukuro Line group includes the Ikebukuro Line and its branches. Ikebukuro Line: Ikebukuro Station—Tokorozawa Station—Hannō Station—Agano Station () offers direct through service via the Seibu Yūrakuchō Line to: Shin-Kiba Station on the Tokyo Metro Yūrakuchō Line and Motomachi-Chūkagai Station on the Minatomirai Line via the Tōkyū Tōyoko Line and the Tokyo Metro Fukutoshin Line. Seibu Chichibu Line: Agano Station—Seibu Chichibu Station () Seibu Yūrakuchō Line: Nerima Station—Kotake-mukaihara Station () connects the Ikebukuro Line and the Tokyo Metro system Toshima Line: Nerima Station—Toshimaen Station () Sayama Line: Nishi-Tokorozawa Station—Seibukyūjō-mae Station () Shinjuku Line Group The Shinjuku Line group includes the Shinjuku Line and its branches, as well as the Tamagawa Line, which is not a branch of the Shinjuku Line but had been owned by the Shinjuku Line's operator before its merger with the Ikebukuro Line operator. Shinjuku Line: Seibu Shinjuku Station–Tokorozawa Station–Hon-Kawagoe Station () Seibuen Line: Higashi-Murayama Station—Seibuen Station () Haijima Line: Kodaira Station—Haijima Station () Tamako Line: Kokubunji Station—Hagiyama Station—Tamako Station () Kokubunji Line: Higashi-Murayama Station—Ogawa Station—Kokubunji Station () Tamagawa Line: Musashi-Sakai Station—Koremasa Station () Until May 31, 2017, this list included the . Prior to the formal closure, the freight line between Minami-Ōtsuka Station and Ahina Station had suspended operation since 1963. People mover Yamaguchi Line: Tamako Station—Seibukyūjō-mae Station () Rolling stock , Seibu operates a fleet of 1,274 electric multiple unit (EMU) vehicles. Seibu 101 series (since 1969) Seibu 2000 series (since 1977) Seibu 4000 series (since 1988) Seibu 6000 series (since 1992) Seibu 9000 series (since 1993) Seibu 10000 series (since 1993) Seibu 20000 series (since 2000) Seibu 30000 series (since 2008) Seibu 40000 series (since March 2017) Seibu 001 series (since 2019) Future rolling stock A new fleet of seven eight-car Seibu 001 series limited express trains