The Mysterious Blue of Hokkaido: Aoi Ike (Blue Pond)

The Blue Pond (Aoi Ike), located in Biei Town, Hokkaido, Japan, is renowned for its mystical and dreamlike cobalt-blue waters.
The standing withered trunks of Japanese larch and birch trees in the pond create a striking contrast with the translucent blue water, evoking an otherworldly scene. This unique blue hue results from the scattering of sunlight by microscopic particles (colloids) formed when minerals such as aluminum from upstream hot spring water mix with the water of the Biei River. As the seasons change, the pond displays varying shades of blue, making it a must-visit destination for photographers and travelers alike.
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Post by Yongzhe | Oct 31, 2025