Ōnuma (大沼) is a low-lying lake in Wakkanai, Hokkaidō, Japan. Its surface area of 4.67 km2 (1.80 sq mi) makes it, by this metric, the twentieth largest on the island. Located a short distance inland from Sōya Bay (宗谷湾), with the city centre to the west and Wakkanai Airport to the east, Ōnuma provides a resting point in the autumn for swans from Siberia on their way to their winter grounds, and again in spring upon their return.[1][2]
Lake Ōnuma | |
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Ōnuma with Sōya Misaki Wind Farm behind | |
![]() ![]() Lake Ōnuma | |
Location | Wakkanai, Hokkaidō |
Coordinates | 31°14′N 130°34′E |
Native name | 大沼 (Japanese) |
Primary outflows | Koetoi River |
Surface area | 4.67 km2 (1.80 sq mi) (2018) |
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