The best time to visit Tomamu depends entirely on your preferred activities, with distinct advantages in both winter and summer.Winter, from December to March, is ideal for those seeking a premium snow experience. The resort is renowned for its light, powdery snow, great for skiing and snowboarding on its well-maintained slopes. You'll also find unique attractions like the Ice Village, featuring ice rinks, ice slides, and ice bars, as well as opportunities for snowmobiling and snowshoeing. Hotels during this period often cater to winter sports enthusiasts, offering ski-in/ski-out access and high-end fitness equipment.Summer, particularly from June to September, offers a completely different set of attractions, focusing on Hokkaido's natural beauty. This is the great time to experience the Unkai Terrace, where you can watch a "sea of clouds" from a mountain top observation deck at sunrise. Other summer activities include mountain biking, river rafting, and hot air balloon rides, providing a refreshing escape from city heat. Families often find the summer months particularly appealing due to the wide range of outdoor adventures suitable for all ages.