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| Lake Tazawa | |
|---|---|
 Kansa Shrine and Lake Tazawa (Feb. 2021) | |
  Lake Tazawa | |
| Location | Semboku, Akita Prefecture |
| Coordinates | 39°43′30″N 140°39′41″E / 39.72500°N 140.66139°E |
| Lake type | crater lake (?) |
| Primary inflows | no natural inflow |
| Primary outflows | no natural outflow |
| Basin countries | Japan |
| Surface area | 25.9 km2 (10.0 sq mi) |
| Average depth | 280.0 m (918.6 ft) |
| Max. depth | 423.4 m (1,389 ft) |
| Water volume | 7.2 km3 (1.7 cu mi) |
| Shore length1 | 20 kilometres (12 mi) |
| Surface elevation | 249 m (817 ft) |
| 1 Shore length is not a well-defined measure. | |
Lake Tazawa (田沢湖, Tazawa-ko) is a caldera lake in the city of Semboku, Akita Prefecture, northern Japan. It is the deepest lake in Japan at 423 metres (1,388 ft). The area is a popular vacation area and several hot spring resorts can be found in the hills above the lake. Akita Prefecture's largest ski area, Tazawako Ski Area [ja], overlooks the lake.