[Hokkaido] A mysterious lake at the foot of an active volcano! A spectacular journey to enjoy Lake Onneto, Yu-no-Taki Falls, and Nishiki-numa.
Lake Onneto is located in Ashoro, Hokkaido.
Set against the backdrop of Mount Meakan and Mount Akan Fuji,
the lake is sometimes called "Goshikinuma" (the Lake of Five Colors)
because its water appears blue or green depending on the weather, the time of day, and your viewing angle.
When I actually visited,
the color of the lake was truly magical—much more mysterious in person than in photos.
This isn’t a lake for sightseeing cruises or paddleboarding,
but rather a place to quietly gaze, walk, and immerse yourself in nature.
Because it remains largely untouched by human development,
you can truly feel the raw power of the active volcano, the sounds of the wind, and the natural hues of the lake.
I personally love volcanic landscapes,
and Lake Onneto perfectly captures that unique charm.
From the shores, you can see Mount Meakan and Mount Akan Fuji.
More than just a pretty lake,
it offers a breathtaking view that lets you feel the raw strength of Hokkaido's nature.
The clouds above the mountains move swiftly, and the lake's colors shift rapidly with the weather and changing sunlight—this dynamic beauty is what makes Onneto so captivating.
There are walking trails and trekking routes nearby,
and even a short stroll reveals different faces of Lake Onneto.
If you have time, be sure to also check out the nearby "Onneto Yu-no-Taki Falls."
This is a rare waterfall where thermal spring water flows down.
It is a globally significant site where you can observe manganese oxides forming on the surface.
Designated as a National Natural Monument, it has a special, unique aura unlike any ordinary waterfall.
Another spot worth visiting is "Nishiki-numa."
It’s a small, reddish-brown pond.
The iron-rich water flowing from here into Lake Onneto
is said to be one of the reasons behind the lake's mysterious colors.
The blue-green waters of Lake Onneto, the reddish-brown Nishiki-numa, and the hot spring flows of Yu-no-Taki Falls.
It’s fascinating to see such diverse natural wonders located so close together.
The clouds above the mountains move swiftly, and the lake's colors shift rapidly with the weather and changing sunlight—this dynamic beauty is what makes Onneto so captivating.
There is so much to love about Lake Onneto.
However, keep in mind that Mount Meakan is an active volcano.
Before visiting, please make sure to check the latest volcanic activity reports and road conditions.
As long as you stay within designated areas and enjoy it safely,
Lake Onneto will leave you with an unforgettable, spectacular view of Hokkaido.
If you love nature and volcanic landscapes,
this is a place you simply must visit at least once.
Yu-no-Taki Falls