Tokyo Metro Marunouchi Line Stairwell with Exposed Conduit

This stairwell descends into the Tokyo Metro Marunouchi Line, a vital artery of the city's public transportation system. Opened in stages between 1954 and 1962, the Marunouchi Line is Tokyo's second-oldest subway. Many stations, particularly those from the line's initial construction, feature design elements from the postwar reconstruction era, such as ceramic tile walls and exposed conduit, reflecting a period of rapid development and functional engineering.