Okutama is located in the Okutama Mountains of far western Tokyo. It is geographically the largest municipality 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.
Mountains •
Mount Kumotori • :Mount Kumotori, at 2017 m is the highest mountain in
Tokyo and the westernmost place of Tokyo. Many plants grow here during the summer, most notably the
tsuga. From the summit, there is a clear view of
Mount Fuji and the
Okuchichibu Mountains. • Mount Mitō • :Because it was forbidden to enter Mount Mitō during the
Edo period, there are still many forests of enormous
beech trees.
Mount Fuji and Mount Kumotori can be seen from the summit, and it attracts many visitors especially during autumn. It is one of the Three Mountains of Okutama. •
Mount Odake (Tokyo) • :Mount Ōdake is one of the Three Mountains of Okutama. From the summit at 1266 m,
Mount Fuji can be seen to the south and Mount Gozen to the west. • Mount Kawanori • :From Mount Kawanori, all mountains in Okutama can be seen. Also, the Hyakuhiro Waterfall is located here. • Mount Gozen • :Mount Gozen is well known for its oddly perfectly triangular shape. Like Mount Mitō, it attracts visitors in the fall.
Rivers •
Tama River • :The Tama River, with a length of 138 km, is the longest river in the prefecture. It flows through the entire prefecture, and the upstream of the river is located in Okutama. • Hinohara River • :The Hinohara River is a rather short and small river located in the western portion of Tokyo.
Lakes •
Lake Okutama • Lake Shiromaru • :Lake Shiromaru is a rather infamous dam on the Tama River. It has a height of 30.3 m, a length of 61 m, and a volume of 14,161
m3.
Surrounding municipalities Saitama Prefecture •
Chichibu •
Hannō Tokyo Metropolis •
Akiruno •
Hinohara •
Ōme Yamanashi Prefecture •
Kosuge •
Uenohara •
Tabayama Climate Okutama has a
humid subtropical climate (Köppen
Cfa) characterized by warm summers and cool winters with light to no snowfall. The average annual temperature in Okutama is 10.6 °C. The average annual rainfall is 2091 mm with September as the wettest month. The temperatures are highest on average in August, at around 22.1 °C, and lowest in January, at around minus 1.1 °C. {{Weather box ==Demographics==