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The vividly deep blue "Platinum Blue Pond" is one of the top tourist attractions in the Biei region of Hokkaido. This artificial lake was unexpectedly formed during a disaster prevention project to prevent volcanic mudflows from Mount Tokachi, where river water was retained by a concrete dam set up on the Biei River. This incredibly beautiful blue lake, combined with the lush greenery and the larch deadwood surrounding it, creates a dreamlike atmosphere reminiscent of a fairy tale world.
The color of the lake changes with the seasons, time of day, and weather. In spring, a large amount of snowmelt flows in, presenting a bluish-green hue. In summer, under bright sunlight, it transforms into a refreshing, clear light blue world. In autumn, the lake's color competes with the vibrant red leaves surrounding it, creating a breathtaking scene. In winter, the frozen lake surface is covered with soft white snow, turning the area into a silver-white world.
From November to around April, nighttime illuminations are held. The blue world, highlighted by the lights, is incredibly moving. There is a walking path along the pond where visitors can leisurely stroll and immerse themselves in the beauty of "Biei Blue" from various angles.
