The Ark Hills Sengokuyama Mori Tower (アークヒルズ仙石山森タワー) is a 206.7 m (678 ft) mixed-use skyscraper in Roppongi, Minato ward, Tokyo. The building was designed by Irie Miyake Architects and Engineers and Pelli Clarke Pelli Architects, while the construction process was managed by Obayashi Corporation. In addition, it was developed by Mori Building Company. Construction of the tower started in 2009 and completed in 2012. It has 47 storeys.