Motomachi-Chukagai Station is an underground railway station on the Minatomirai Line subway in Naka-ku, Yokohama, Kanagawa Prefecture, Japan, operated by the third-sector railway operating company Yokohama Minatomirai Railway Company. It is numbered "MM06", and its official name, as shown on signage in the station, is "Motomachi-Chūkagai Station (Yamashita-kōen)" with the sub-name in parentheses, although the use of this full name is limited.

The Minatomirai 21 Line, commonly known as the Minatomirai Line, is a subway line in Yokohama, Japan that runs from Yokohama Station to Motomachi-Chūkagai Station through the Minatomirai 21 business district. The line opened in 2004 and is operated by the Yokohama Minatomirai Railway Company.