Roppongi Hills (六本木ヒルズ, Roppongi Hiruzu) is a development project in Tokyo and one of Japan's largest integrated property developments, located in the Roppongi district of Minato, Tokyo. The architecture and use of the space is documented in the book Six Strata: Roppongi Hills Redefined. Constructed by building tycoon Minoru Mori, the mega-complex incorporates office space, apartments, shops, restaurants, cafés, movie theatres, a museum, a hotel, a major TV studio, an outdoor amphitheatre, and a few parks. The centerpiece is the 54-story Mori Tower. Mori's stated vision was to build an integrated development where high-rise inner-urban communities allow people to live, work, play, and shop in proximity to eliminate commuting time. He argued that this would increase leisure time, quality of life, and benefit Japan's national competitiveness. Seventeen years after the design's initial conception, the complex opened to the public on April 25, 2003.