digplanet beta 1: Athena
Share digplanet:


Applied sciences






















Lake Sai march evening 5-30pm from eastern end.jpg
from Eastern end
Location Yamanashi Prefecture
Coordinates 35°29′54″N 138°41′07″E / 35.49833°N 138.68528°E / 35.49833; 138.68528Coordinates: 35°29′54″N 138°41′07″E / 35.49833°N 138.68528°E / 35.49833; 138.68528
Primary inflows none
Basin countries Japan
Surface area 2.1 km²
Max. depth 71.7 m
Shore length1 9.85 km
Surface elevation 901 m
1 Shore length is not a well-defined measure.

Lake Saiko (西湖 Saiko?) is the one of the Fuji Five Lakes and located in southern Yamanashi Prefecture near Mount Fuji, Japan.

It is the fourth of the Fuji Five Lakes in terms of surface area, and second deepest, with a maximum water depth of 71.1 metres (233 ft).[1] Its surface elevation of 900 metres (3,000 ft) is the same as for Lake Motosu and Lake Shōji, confirming that these three lakes were originally a single lake, which was divided by an enormous lava flow from Mount Fuji during an eruption from 864-868 AD.[2] The remnants of the lava flow are now under the Aokigahara Jukai Forest, and there is evidence to indicate that these three lakes remain connected by underground waterways.[1]

The lake is within the borders of the Fuji-Hakone-Izu National Park.[3]

Saiko has no natural drainage, but an artificial channel now connects it to Lake Kawaguchi. As with the other Fuji Five Lakes, the area is a popular resort, with many lakeside hotels, windsurfing facilities, camp sites, and excursion boats. Japanese crucian carp, wakasagi and Kunimasu were introduced to the lake in the Meiji period, and sports fishing is also popular.

However, Kunimasu, which had been introduced to a number of lakes in Japan in the Taisho period were believed to have died out and become extinct, with the last reported sighting in 1935, until rediscovered in Lake Sai in 2010.[4]

West Lake in Hangzhou, China, is written with the same kanji as Lake Sai.

See also[edit]

Pictures of Lake Sai[edit]


  • Rafferty, John P. Plate Tectonics, Volcanoes, and Earthquakes. Rosen Publishing (2010), ISBN 1615301062


  1. ^ a b "Yamanashi Sightseeing Net". yamanashi-kankou.jp. Retrieved 2007-05-25. 
  2. ^ Rafferty, Tectonics, Volcanoes, and Earthquakes. page 135
  3. ^ Fuji-Hakone-Izu National Park(Ministry of the Environment (Japan))
  4. ^ 'Extinct' trout species rediscovered. Yomiuri Shimbun Dec. 16, 2010

Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Saiko_Lake — Please support Wikipedia.
This page uses Creative Commons Licensed content from Wikipedia. A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia.

2 news items

The Japan Times

The Japan Times
Wed, 15 Dec 2010 15:58:00 -0800

KYOTO – A scientist said Wednesday his team has found that an indigenous freshwater salmon species classified as extinct by the government around 70 years ago still exists in Lake Saiko, Yamanashi Prefecture. Kyoto University professor Tetsuji Nakabo ...

The Japan Times

The Japan Times
Tue, 17 Jan 2012 15:48:45 -0800

FUJIKAWAGUCHIKO, YAMANASHI PREF. – The Yamanashi Prefectural Government plans to raise an endangered deepwater salmon species discovered in 2010 in Lake Saiko at the foot of Mount Fuji — 70 years after it died out in its original habitat 500 km ...

Oops, we seem to be having trouble contacting Twitter

Support Wikipedia

A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia. Please add your support for Wikipedia!

Searchlight Group

Digplanet also receives support from Searchlight Group. Visit Searchlight