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| Lake Okutama | |
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  Lake Okutama
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| Coordinates | 35°47′N 139°02′E / 35.783°N 139.033°E / 35.783; 139.033 |
| Lake type | reservoir |
| Primary inflows | Tama River, Kosuge River |
| Primary outflows | Tama River |
| Basin countries | Japan |
| Surface area | 4.25 km2 (1.64 sq mi) |
| Max. depth | 142 m (466 ft) |
| Surface elevation | 526.5 m (1,727 ft) |
Lake Okutama (奥多摩湖, Okutama-ko) is in Tokyo and Yamanashi PrefecturesinJapan. Lying above the Ogōchi Dam, it is also known as the Ogōchi Reservoir. Lake Okutama is an important source of drinking water for Tokyo.
The lake occupies part of the townofOkutamainNishitama District, Tokyo and the villageofTabayamainKitatsuru District, Yamanashi.
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 in the spring.[1]
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