Blue Pond is a puddle
This artificial pond was created by accident when water accumulated in one of the weirs constructed along the main stream of the Biei River to prevent volcanic mud flow disasters caused by sediments from the 1988 eruption of Tokachi-dake volcano.
In 1989, a concrete block weir was constructed, and water began to accumulate in the block weir on the left bank of the Biei River, submerging and killing larch, white birch, and other trees that had grown wild in the surrounding area.
As a result, the scenery of dead larch trees and a blue pond was created by chance.
The scenery changes with the seasons
The pond's blue color contrasts with the fresh greenery, the surface of the water is colored with autumn leaves in fall, and in midwinter, the pond freezes over and turns completely white, offering a different view each season.
Blue Pond Light-up
The pond is illuminated seasonally to create a mysterious sight.