Lake Kuttara
Lake Kuttara (倶多楽湖, Kuttara-ko) is a nearly circular caldera lake in Shiraoi, Hokkaidō, Japan. It is part of Shikotsu-Tōya National Park. The lake is recognized as having the best water quality in all of Japan. With a transparency of 19 metres (62 ft), the lake ranks second to Lake Mashū according to the Ministry of the Environment.
| Lake Kuttara | |
|---|---|
| 倶多楽湖 (Japanese) | |
View from the crater rim (August 2017). | |
Lake Kuttara | |
| Coordinates | 42°30′N 141°10′E |
| Type | oligotrophic crater lake |
| Primary inflows | none |
| Primary outflows | evaporation |
| Basin countries | Japan |
| Surface area | 4.68 km2 (1.81 sq mi) |
| Max. depth | 148 m (486 ft) |
| Shore length1 | 8 km (5.0 mi) |
| Surface elevation | 258 m (846 ft) |
| Islands | none |
| Settlements | Shiraoi |
| References | |
| 1 Shore length is not a well-defined measure. | |
Resident species of the lake include a salamander species, Ezo salamander (エゾサンショウウオ, Ezo Sanshōuo). Since 1909, Sockeye salmon have been introduced to the lake.
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