725. Sendou Firefly Inn, Yufuin ★ I went for a day visit for 1000 (public bath) and 2500 (private bath, one of five). Day visits are listed as 10:00 to 16:00. 1. Outdoor stone bath. No view, but cozy. The water is clear, temperature 42. 2. Private indoor reclining bath. There is a TV. The water is clear. The temperature was 53 at first, and you can dilute it. It feels a bit stuffy inside. 3. Private indoor round bath. 4. Private indoor rectangular bath. A pleasant, solid place. 05.01.2026
Day Use
Yes10:00–16:00
¥1,000
¥2500 private bath
Bathing & Water
Outdoor BathYes
Open-air outdoor bath
Indoor BathYes
Enclosed indoor bathing area
OnsenYes
Uses natural hot spring water
Capabilities
Private BathYes
Private bath available for day-use visitors or hotel guests to reserve
5 private baths
Room OnsenYes
Private onsen bath in guest rooms, for overnight guests only