This lake is surrounded by mountains and forests, and the water is crystal clear. The scenery around it is absolutely stunning. You can hike around and explore the natural beauty, as well as observe the local wildlife.

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Lake Onneto
It is a mysterious lake and is also called Goshikinuma-lake.
Onneto is the westernmost lake in Akan Mashu National Park. It is also called Goshikinuma (a five-colored lake) because the lake changes its color to five different colors depending on the season, time of day, and angle of view. The lake is only 2.5 kilometers in circumference and can be walked around in about 40 minutes, allowing visitors to enjoy the colorful scenery.
The color is usually cobalt blue, but when the mountain trees turn green, the lake reflects the green mountains, and the lake turns green; when the leaves turn red, the lake reflects the red leaves, and the lake turns red; and depending on the time of day and season, the lake can also appear purple or white.
Onneto, created by nature, is a spot where you can feel as if you are receiving immense power from nature just by taking a stroll. If you visit Hokkaido, we highly recommend seeing it for yourself.
Highlights
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The surface of the lake changes color depending on the season and time of day.
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It takes about 40 minutes to walk around the lake.
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On the west side of the lakeshore, there is a wooden observation deck that offers a panoramic view of the Onneto with Mt.Meakandake and Mt.AkanFuji.
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Mt. AkanFuji and Mt. Meakandake reflected on the lake's surface have become a hot topic on SNS.
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Note that water sports are prohibited to protect the ecological environment.
Photos
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Akan National Park, Onneto
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View of the Autumn leaves in Onneto
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Foggy scenery in Onneto
Reviews
Some reviews are translated by AI.
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The view of Mt. Akan from the observatory is absolutely stunning. This is a hidden natural gem in Hokkaido.
Details
- Name in Japanese
- オンネトー
- Postal Code
- 089-3964
- Address
- Moashoro, Ashorocho, Ashorogun, Hokkaido
- Directions
- Approximately 23 minutes by car from Lake Akan Onsen
- Website
- Official Website (Japanese)