The Seibu Ikebukuro Line is a railway line of the Japanese private railway operator Seibu Railway. It originates at Ikebukuro Station, a large railway junction in north-western Tokyo, extending to northwest suburbs as far as Tokorozawa, Saitama, and nominally terminates at Agano Station.

The Seibu Yūrakuchō Line is an underground railway line operated by the private railway operator Seibu Railway in Japan. The line links the Seibu Ikebukuro Line at Nerima Station with the Tokyo Metro Yūrakuchō Line and Tokyo Metro Fukutoshin Line at Kotake-Mukaihara Station in Nerima, Tokyo.