Mori Building Company

Mori Building Co., Ltd. (森ビル株式会社, Mori Biru Kabushiki Kaisha), operating as Mori Building Company, is a Japanese property management firm. As of 2015 its president and CEO is Shingo Tsuji (辻 慎吾, Tsuji Shingo). 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 (12,500,000 sq ft) of space.

Taikichiro Mori, the founder, quit his job as an economics professor and entered the real estate business. He became the richest man in the world, and his net worth in 1992 was $13 billion U.S. dollars. At the time his net worth was double that of Bill Gates and $3 billion more than Yoshiaki Tsutsumi. Taikichiro Mori died of heart failure on January 30, 1993, at the age of 88.