Mori Building Company, Limited (森ビル株式会社, Mori Biru kabushiki gaisha) is a family-owned Japanese property management firm. As of 2015 its president and CEO is Shingo Tsuji. Its headquarters are in the Roppongi Hills Mori Tower in Roppongi, Minato, Tokyo. Mori Building has been managing office building leases since 1955. Its focus has been in Minato, Tokyo. As of 2011, it manages 107 office facilities in Japan and China with a total of 1,160,000 square metres of space.