Tokyo Midtown is a 569,000-square-meter mixed-use development in Akasaka, Tokyo, Japan. Completed in March 2007, the $3 billion project includes office, residential, commercial, hotel, and leisure space, and the new quarters of the Suntory Museum of Art. When completed, the Midtown Tower was the tallest building in Tokyo. The main building complex iā¦Tokyo Midtown is a 569,000-square-meter mixed-use development in Akasaka, Tokyo, Japan. Completed in March 2007, the $3 billion project includes office, residential, commercial, hotel, and leisure space, and the new quarters of the Suntory Museum of Art. When completed, the Midtown Tower was the tallest building in Tokyo. The main building complex is surrounded by Hinokicho Park, a 10 acre public park containing green areas along with works of art.