Lake Tazawa is a stunning freshwater lake located in Akita Prefecture, Japan. It is known for its deep blue color and is the deepest lake in Japan, reaching a depth of 423 meters. The lake is surrounded by beautiful mountains and offers various recreational activities, including boating and fishing. The area around Lake Tazawa is rich in natural beauty and cultural significance. Visitors can explore nearby attractions such as the Tazawako Onsen hot springs and the Tazawa-ko Shrine. The lake is also famous for its legend of Tazawa, a beautiful maiden who is said to have transformed into the lake itself.