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; Mori Building Company was the developer, while the construction process was managed by Obayashi Corporation.

[1][6][7] The building is situated on 2 hectares (4.9 acres) of land area in Ark Hills, near the Kamiyachō Station on the Tokyo Metro Hibiya Line and the Roppongi-itchōme Station on the Tokyo Metro Namboku Line.

[4][8] The tower is surrounded by gardens that were designed to replicate the natural wildlife in Tokyo.

[9] The building was designed to withstand earthquakes and strong winds by using two different types of mass dampers.