Tama Hills (多摩丘陵, Tama-kyūryō) is an area of hills stretching across southwest Tokyo and northeast Kanagawa Prefecture in the Kantō Plain on Honshū, Japan. Its total area is approximately 300 km2. The Tama River marks its northeastern boundary. The Tama Hills border the Sagamino plateau.It straddles the municipalities of Hachiōji, Hino, Tama, Inagi, and Machida cities in Tokyo, and Kawasaki and Yokohama cities in Kanagawa.