is a major subway station in Chiyoda, Tokyo, Japan, jointly operated by Tokyo Metro and Toei Subway. It is served by five lines, more than any other station on the Tokyo underground network, and is thus the biggest subway station in Tokyo. It is Tokyo Metro's second busiest station, after Ikebukuro.
à Âtemachi Station is within walking distance (either at street level or via underground passages) of Tokyo Station.
The station opened on July 20, 1956 as a station on the Marunouchi Line. The Tà Âzai Line platforms opened on October 1, 1966 as a terminus of the line from Nakano, becoming through platforms on September 14, 1967. The Chiyoda Line platforms opened on December 20, 1969 as the terminus of the line from Kita-Senju; they became through platforms on March 20, 1971. The Mita Line platforms opened on June 30, 1972, and the Hanzà Âmon Line platforms on January 26, 1989.
With the exception of the Mita Line, the station facilities of the remaining lines were inherited by Tokyo Metro after the privatization of the Teito Rapid Transit Authority (TRTA) in 2004.