Lake Mashu (Teshikaga Town, Hokkaido)
Lake Mashu (Teshikaga, Hokkaido) — Overview (History, Features, and Attractions) Lake Mashu is a caldera lake located in Akan-Mashu National Park in eastern Hokkaido. Formed in a deep crater created by volcanic activity thousands of years ago, the lake's water is exceptionally clear and known for its beautiful "Mashu Blue" color. Early mornings and...