Lake Tazawa — Japan's Deepest Azure Lake

Lake Tazawa (田沢湖) is Japan's deepest lake at 423 meters, located in Akita's mountainous interior. The depth creates an otherworldly cobalt-blue color — the water absorbs red wavelengths and reflects deep blue, similar to Crater Lake in Oregon. The lake's near-perfect circular shape (circumference 20km) results from volcanic caldera formation 16,000 years ago. Despite freezing Akita winters, Tazawa never freezes due to its depth and geothermal activity, maintaining 2-3°C even in January.

The lake's icon is the golden statue of Princess Tatsuko (辰子像), standing on a small peninsula jutting into the water. According to legend, Tatsuko drank from a sacred spring seeking eternal youth, transformed into a dragon, and now inhabits the lake depths. The gilded bronze statue (1968, sculptor Yasutake Funakoshi) depicts her in the moment before transformation — serene, elegant, gazing across the blue expanse. On calm days, the statue's reflection merges with the lake, creating surreal photographic symmetry.