Lake Akan is a picturesque lake located in Akan National Park on the island of Hokkaido, Japan. Known for its stunning natural beauty, the lake is surrounded by lush forests and mountains, making it a popular destination for nature lovers and outdoor enthusiasts. The lake is also famous for its unique round stones called marimo, which are a type of algae that grow into green, fluffy balls. The area around Lake Akan offers various recreational activities, including hiking, canoeing, and fishing. Visitors can also explore the nearby Akan Onsen hot springs, which provide a relaxing experience after a day of outdoor adventures. The lake's serene environment and rich biodiversity make it a significant ecological site in Japan.