Mitsubishi Estate Co., Ltd. (三菱地所株式会社, Mitsubishi Jisho Kabushiki-gaisha, MEC) is Japan's second-largest real-estate developer (after Mitsui Fudosan) and is involved in property management and architecture research and design. MEC owns Japan's second tallest building, the Yokohama Landmark Tower, as well as the Sanno Park Tower and Marunouchi Building in Tokyo. Mitsubishi Estate has its headquarters in the Otemachi Building in Ōtemachi, Chiyoda, Tokyo. It is one of the core Mitsubishi companies.