is in

Tokyo Tokyo (; ja, 東京, , ), officially the Tokyo Metropolis ( ja, 東京都, label=none, ), is the capital and largest city of Japan. Formerly known as Edo, its metropolitan area () is the most populous in the world, with an estimated 37.468 ...

and

Yamanashi Prefecture is a prefecture of Japan located in the Chūbu region of Honshu. Yamanashi Prefecture has a population of 817,192 (1 January 2019) and has a geographic area of 4,465 km2 (1,724 sq mi). Yamanashi Prefecture borders Saitama Prefecture to the no ...

s in

Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...

. Lying above the Ogōchi Dam, it is also known as the Ogōchi Reservoir. Lake Okutama is an important source of

drinking water Drinking water is water that is used in drink or food preparation; potable water is water that is safe to be used as drinking water. The amount of drinking water required to maintain good health varies, and depends on physical activity level, a ...

for Tokyo.

Description

The lake occupies part of the

town A town is a human settlement. Towns are generally larger than villages and smaller than cities, though the criteria to distinguish between them vary considerably in different parts of the world. Origin and use The word "town" shares an ori ...

Okutama is a town located in the western portion of Tokyo Metropolis, Japan. , the town had an estimated population of 4,949, and a population density of 22 persons per km2. The total area of the town is . Geography Okutama is located in the Okutama Mo ...

Nishitama District, Tokyo is a district located in Tokyo Metropolis, Japan. It comprises the following three towns and a village: * Hinode *Mizuho * Okutama * Hinohara Historically, the cities of Ōme, Fussa, Hamura, and Akiruno were part of Nishitama District but t ...

and the

village A village is a clustered human settlement or community, larger than a hamlet but smaller than a town (although the word is often used to describe both hamlets and smaller towns), with a population typically ranging from a few hundred to ...

Tabayama is a village located in Yamanashi Prefecture, Japan. , the village had an estimated population of 529, and a population density of 5.79 persons per km2. The total area of the village is . Geography Located in the northeastern corner of Yamana ...

Kitatsuru District, Yamanashi is a rural district located in northeastern Yamanashi Prefecture, Japan. As of July 2012, the district had an estimated population of 1,406 and a population density of 9.12 persons per km2. The total area was 154.2 km2. The district form ...

. The Taba ( Tama) River feeds Lake Okutama at its western end. From the southwest, the Kosuge River also flows into the lake. The Tama River drains the lake at the eastern end. The surroundings are famous for

cherry blossoms A cherry blossom, also known as Japanese cherry or sakura, is a flower of many trees of genus ''Prunus'' or ''Prunus'' subg. ''Cerasus''. They are common species in East Asia, including China, Korea and especially in Japan. They generall ...

in the spring.Cook, Chris,
Under the lonesome trees
, ''

Japan Times ''The Japan Times'' is Japan's largest and oldest English-language daily newspaper. It is published by , a subsidiary of News2u Holdings, Inc.. It is headquartered in the in Kioicho, Chiyoda, Tokyo. History ''The Japan Times'' was launched by ...

'', 27 April 2007, p. 24.

Ogōchi Dam

* Dam height: 148 m * Dam length: 353 m * Greatest depth: 142 m * Mean depth: 43.6 m * Circumference when full: 45.37 km * Altitude of surface when full: 526.5 m * Area of surface when full: 4.25 km² * Capacity: 185,400,000 m³ * Completion: 1957 * Displaced: 945 households * Died during construction: 87 people

Notes

External links

Tokyo Metropolitan Government Bureau of Waterworks
{{DEFAULTSORT:Okutama Landforms of Tokyo Reservoirs in Japan Western Tokyo Landforms of Yamanashi Prefecture