Ōtemachi Station(大手町駅,Ōtemachi-eki?) is a 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.
Ōtemachi is also 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 Tōzai 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 Hanzōmon Line platforms on January 26, 1989.