The Tokyo Metro Fukutoshin Line, the operator's Line 13, opened on 14 June 2008 and sits at the centre of one of the Tokyo area's largest through-running networks. From its opening, trains ran through at the northern end onto the Tobu Tojo Line and, via the Seibu Yurakucho Line, the Seibu Ikebukuro Line. The network was completed at the southern end on 16 March 2013, when through-running began with the Tokyu Toyoko Line and continued onto the Yokohama Minatomirai Railway's Minatomirai Line to Motomachi-Chukagai. This joined four private operators and Tokyo Metro into a single corridor from Saitama through central Tokyo to Yokohama. The arrangement was extended again on 18 March 2023, adding direct service toward the Sotetsu network via the new Shin-Yokohama lines.
Timeline
2008The Tokyo Metro Fukutoshin Line opened on 14 June 2008, through-running at its northern end with the Tobu Tojo Line and, via the Seibu Yurakucho Line, the Seibu Ikebukuro Line.
2013On 16 March 2013 through-running began at the southern end with the Tokyu Toyoko Line and onward to the Minatomirai Line, linking the line's northern and southern partners into one network.
2023On 18 March 2023 the network was extended toward the Sotetsu lines via the new Tokyu Shin-Yokohama Line and Sotetsu Shin-Yokohama Line.
