Marunouchi (丸の内) is a commercial district located in Chiyoda, Tokyo, Japan. Situated between Tokyo Station and the Imperial Palace, the name, meaning "inside the circle", derives from its location within the palace's outer moat. It is also Tokyo's financial district and the country's three largest banks are headquartered there.

Mitsubishi Estate Company, Limited is one of the largest real-estate developers in Japan and is involved in property management and architecture research and design.