is a nearly circular
caldera
A caldera ( ) is a large cauldron-like hollow that forms shortly after the emptying of a magma chamber in a volcano eruption. When large volumes of magma are erupted over a short time, structural support for the rock above the magma chamber is ...
lake in
Shiraoi,
Hokkaidō
is Japan's second largest island and comprises the largest and northernmost prefecture, making up its own region. The Tsugaru Strait separates Hokkaidō from Honshu; the two islands are connected by the undersea railway Seikan Tunnel.
The la ...
,
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 ...
.
It is part of
Shikotsu-Tōya National Park
is a national park in the western part of the island of Hokkaidō, Japan. Named after the volcanic caldera lakes of Lake Shikotsu and Lake Tōya, it has a total area of 993.02 square kilometers. The popular hot spring resort of Noboribetsu is al ...
. The lake is recognized as having the best water quality in all of Japan.
With a transparency of , the lake ranks second to
Lake Mashū
(Ainu language, Ainu: Kamuy-to) is an endorheic Volcanic crater lake, crater lake formed in the caldera of a potentially active volcano. It is located in Akan Mashu National Park on the island of Hokkaido, Japan. It has been called the clearest ...
according to the
Ministry of the Environment.
Resident species of the lake include a
salamander
Salamanders are a group of amphibians typically characterized by their lizard-like appearance, with slender bodies, blunt snouts, short limbs projecting at right angles to the body, and the presence of a tail in both larvae and adults. All ten ...
species, . Since 1909,
Sockeye salmon
The sockeye salmon (''Oncorhynchus nerka''), also called red salmon, kokanee salmon, blueback salmon, or simply sockeye, is an anadromous species of salmon found in the Northern Pacific Ocean and rivers discharging into it. This species is a P ...
have been introduced to the lake.
See also
*
List of volcanoes in Japan
This is a list of active and extinct volcanoes in Japan. An Orange background indicates a volcano considered active by the Japan Meteorological Agency.
Hokkaido
Honshū
Izu Islands
Ogasawara Archipelago
The Ogasawara Archipelag ...
*
List of lakes in Japan
The list of lakes in Japan ranked by surface area.
1) For lakes in the Hokkaidō region, Subprefecture is listed
See also
*List of lakes by area
*List of lakes by depth
*List of lakes by volume
References
*The Japanese Ministry of Land, Infra ...
References
External links
*
Kuttara- Japan Meteorological Agency
* - Japan Meteorological Agency
- Geological Survey of Japan
*
Kuttara
Kuttara
Kuttara
Shikotsu-Tōya National Park
Kuttara
Pleistocene calderas
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