Marunouchi Line Train Entering Yotsuya-Sanchome Station

A Tokyo Metro Marunouchi Line train approaches its terminal platforms during a March 2023 visit. The Marunouchi Line, one of Tokyo’s earliest postwar subway routes, opened in 1954 and played a key role in connecting the expanding Yamanote district centers with government and commercial areas in central Tokyo. Ikebukuro, the northern terminus of the line, is one of Tokyo’s busiest rail hubs, jointly served by JR East, the Seibu and Tobu railway networks, and several Metro lines. The station complex was heavily rebuilt throughout the late 20th century to handle increasing commuter volumes, resulting in the multi-level platform and passageway layout still in use today.

Taken March 2023