Snow monkeys at Jigokudani地獄谷野猿公苑
Wild macaques bathe in a steaming valley pool, best from December to March, with snow-capped faces in January and February. Arrive at 9:00 to 10:00, wear micro-spikes, and stay in Shibu if you want the nine baths too. Entry is ¥1,000 from 1 December 2026 (¥880 online). Yudanaka and Shibu guide.