732. Yunotsubo Onsen, Yufuin ★★ A no-frills onsen for ¥200, payment goes into a box. The stated hours are 10:00 to 22:00. If you open the far window, you can stand and see the mountain from it. The water is clear, and the temperature is 43. It is comfortable to breathe inside. A high-quality, old-school onsen made with care and heart. Recommended for a visit. 06.01.2026