東京メトロ丸ノ内線
The Tokyo Metro Marunouchi Line platforms are located on the second basement ("B2F") level running approximately east to west, and the Fukutoshin Line platforms are located on the third basement ("B3F") level running approximately north to south. They are linked by stairs and escalators at the north end of the Fukutoshin Line platforms and east end of the Marunouchi Line platforms.