Lake Onneto
オンネトー
A mysterious small lake at the foot of Mount Meakan. Its colour shifts between emerald and deep blue depending on the weather and viewing angle, earning it the name Five-Colour Pond.
Lake Onneto is a small lake on the western slope of Mount Meakan. Its volcanic acidic water supports almost no fish, which keeps the lake clear. Depending on the weather, season and viewing angle, it shows shades of blue and green, and it is also called Goshiki-numa, meaning Five-Colour Pond. It is one of Hokkaido's three secret lakes. Against the backdrop of Mount Meakan and Mount Akan-Fuji, the lake has trails and campsites along its shore. Nearby, you can see Yu-no-taki, a waterfall formed by manganese deposits and designated a national natural monument. Admission is free. The road is closed from about December to April. It is about 25 minutes by car from Akan Lake Onsen.
Opening hours
Open all day (roads closed approx. Dec–Apr in winter)
Nearby sights
- Mount Meakan
- Akanko Ainu Kotan
- Bokke Mud Volcano
- Lake Akan
- Sokodai Observatory
- Akan International Crane Center "Grus"
- Bihoro Pass
- Tsurui-Ito Tancho Crane Sanctuary