The Gian Wall of Icicles at Shirakawa is the main winter feature of Kiso, Nagano Prefecture. The underground water from Mt. Ontake spring at the cliff of Shirakawa, and in winter, water frozen up and became the huge Icicles.
It becomes 50m tall and 250m wide. The entire cliff became the giant walls of Icicle. It appears from the middle of January to the end of Feburary. It has a beautiful lighten up at night. Light up end at 21:30.