Lake Akan (Hokkaido): Marimo Moss Balls, Ainu Kotan Village & Caldera Lake Guide (2026)
In eastern Hokkaido, surrounded by primeval forest, lies the mystical Lake Akan—a caldera lake formed approximately 150,000 years ago through volcanic activity. With a circumference of about 26 kilometers and maximum depth of 45 meters, this lake is world-renowned as the habitat of the nationally designated Special Natural Monument “Marimo” (moss balls), attracting approximately 1.5 […]
Lake Akan (Hokkaido): Marimo Moss Balls, Ainu Kotan Village & Caldera Lake Guide (2026) Read More »



