This “waterfall of white threads”, 70 meters wide, is heated by nearby Mt Asama — a Category A active volcano. As a result, the water temperature is a constant 11C year-round. The water seeps from the ground above the falls, and spills gently down the three-meter drop. The resulting idyllic falls and pond are surrounded by green nature in a remote area of Karuizawa, in Nagano Prefecture.
From the pond, the water spills down a series of step-like falls (before running down to the road, where the stream disappears into a culvert).
Despite the remote location, the falls are a popular tourist attraction. Shops by the entrance serve oyaki, fresh roasted fish and other delicacies to the crowds. Buses run from Karuizawa Station once or twice an hour at most, so check the schedule before arriving.