東京メトロ丸ノ内線
An increasing number of subways are becoming one-person operation, including the Nagahori Tsurumi-ryokuchi Line, which was designed to operate on one-person operation, Toei Ōedo Line, which was one-person operated since its opening in the year 1990, and the Tokyo Metro Marunouchi Line, which became driver-only operated from 2009.