is in Tokyo

Tokyo

, ; officially , is one of the 47 prefectures of Japan. Tokyo is the capital of Japan, the center of the Greater Tokyo Area, and the largest metropolitan area of Japan. It is the seat of the Japanese government and the Imperial Palace, and the home of the Japanese Imperial Family...

 and Yamanashi Prefecture

Yamanashi Prefecture

is a prefecture of Japan located in the Chūbu region of the island of Honshū. The capital is the city of Kōfu.-Pre-history to the 14th century:People have been living in the Yamanashi area for about 30,000 years...

s in Japan

Japan

Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

. Lying above the Ogōchi Dam, it is also known as the Ogōchi Reservoir. The lake occupies part of the town

Towns of Japan

A town is a local administrative unit in Japan. It is a local public body along with prefecture , city , and village...

 of Okutama

Okutama, Tokyo

is a town in Nishitama District, Tokyo. 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 km², it is the largest community in Tokyo. Mount Kumotori, Tokyo's highest peak at 2017 m, divides Okutama from the...

 in Nishitama District, Tokyo

Nishitama, Tokyo

is a district in Tokyo, Japan. It comprises the following three towns and a village:*Hinohara*Hinode*Mizuho*OkutamaHistorically, the cities of Ōme, Fussa, Hamura, and Akiruno were part of Nishitama District but these are now cities and currently broke off from the District after they gained city...

 and the village

Villages of Japan

A is a local administrative unit in Japan.It is a local public body along with , , and . Geographically, a village's extent is contained within a prefecture....

 of Tabayama

Tabayama, Yamanashi

is a village located in Kitatsuru District, Yamanashi, Japan.As of 2007, the village has an estimated population of 740 and a density of 7.3 persons per km². The total area is 101.55 km².-Geography:...

 in Kitatsuru District, Yamanashi

Kitatsuru District, Yamanashi

is a district located in Yamanashi, Japan.As of 2003, the district has an estimated population of 29,030 and a density of 103.79 persons per km². The total area is 279.71 km².There are only two villages left in the district.*Kosuge*Tabayama-History:...

. Lake Okutama is an important source of drinking water

Water resources

Water resources are sources of water that are useful or potentially useful. Uses of water include agricultural, industrial, household, recreational and environmental activities. Virtually all of these human uses require fresh water....

 for Tokyo.

Data

• Dam height: 149 m
• Dam length: 353 m
• Greatest depth: 142 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, 6,000 people
• Died during construction: 87 people

Around the lake

The Taba (Tama

Tama River

The is a major river in Yamanashi, Kanagawa and Tokyo Prefectures on Honshū, Japan. It is officially classified as a Class 1 river by the Japanese government....

) 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

Hanami

is the Japanese traditional custom of enjoying the beauty of flowers, "flower" in this case almost always meaning cherry blossoms or ume blossoms. From the end of March to early May, sakura bloom all over Japan, and around the first of February on the island of Okinawa...

in the spring.