Mt. Sandan (三段山, 1,748m) is a classic staple for backcountry skiing in the Tokachi Ranges, and is renowned for its powder snow. The route starts and ends on an old ski area, so even the lower reaches on the downhill allow for fun tree-free runs. The route is accessed from the hopelessly amazing Hakuginso Lodge - a mountain lodge boasting to be the "mecca of powder" with everything you could possibly want: onsen hotsprings, a large communal kitchen, a large basement drying room, friendly staff, and only 2,750yen a night. On a clear day you'll be able to see across to the Furano Plains and Mashike Ranges.