Okutama(奥多摩町,Okutama-machi, Oku-Tama-machi) is a town located in Nishitama District, Tokyo Metropolis, Japan. As of August 1, 2007, the town had a population of 6712 people, of which 3280 were men and 3432 were women. With an area of 225.63 km, it is the largest community in Tokyo. Mount Kumotori, Tokyo's highest peak at 2017 m, divides Okutama from the Okuchichibu region of the neighboring Saitama and Yamanashi Prefectures. Tokyo's northernmost and westernmost points lie in Okutama, as does Lake Okutama, an important source of water for Tokyo, situated above the Ogōchi Dam in the town.