Roppongi Hills Mori Tower is a 54-story mixed-use skyscraper in Roppongi, Minato, Tokyo, Japan. Completed in 2003 and named after builder Minoru Mori, it is the centerpiece of the Roppongi Hills urban development. It is the sixth-tallest building in Tokyo at 238 meters. The tower has a floor space area of 379,408 square meters, making it one of the largest buildings in the world by this measure.