Lake Shikotsuko Ice Festival

Lake Shikotsu is a caldera lake formed by volcanic activity. After a massive eruption, the ground collapsed, creating a huge depression that later filled with water, forming the present lake. The formation is estimated to date back tens of thousands of years. The area surrounding the lake still retains clear volcanic landform characteristics. Active volcanoes such as Mount Tarumae are located nearby, and the geological structure is a typical caldera terrain. Lake Shikotsu is the second deepest lake in Japan, with a maximum depth of approximately 360 meters. Because of its depth, the lake rarely freezes completely even in winter. Water clarity is another defining feature. There are relatively few inflowing rivers, and the volcanic rock–based geological structure reduces sediment accumulation. From a tourism resource perspective, this has effectively created the brand value of a “crystal-clear caldera lake.” It is majestic and beautiful. Walking down to the lakeshore, only the sound of wind and occasional ripples can be heard. The transparent water and mountain peaks that look like they are covered in perennial snow create a striking harmony. Wildlife, including deer, appears naturally. Seeing deer that did not overly avoid people felt warm and familiar. Honestly, I prefer it to Sapporo and Otaru.