Kaihotsu, Fukui City, Fukui
ONSEN & SAUNA RESORT Kaihotsu-no-Yu
Kaihotsu-no-Yu is a flexible new option for anything from a 90-minute bath to a half-day visit, with sauna and separate carbonated bathing. Its spring details are still sparse under the new brand, and tattoos require the facility's own cover seals.
Check before bathing
- Opening hours
- The rebranded facility opened on August 3, 2026. Natural-bath hours are 06:00–01:00. A 90-minute visit costs ¥880 for adults on weekdays and ¥980 on weekends and public holidays; adult full-time admission is ¥1,480 on weekdays and ¥1,680 on weekends and public holidays.
- Tattoo policy
- Entry is generally refused, but guests may enter if they completely cover their tattoos with up to two of the facility's designated cover seals.
Spring & water temperature
- Spring-source temperature
- Not published
- Bathing temperature
- Not published
- Spring source
- Natural spring water drawn from about 1,300 metres underground, according to the current rebranded facility page
- Spring classification
- The former Relaim site listed an alkaline simple spring; the new brand's current main pages have not republished the classification
- pH
- Not published
- Flow rate
- Not published
- Water handling
- The current site distinguishes its natural-spring bath from the high-concentration carbonated bath. Pool-by-pool conditions for water addition, heating, circulation and disinfection are not published.
Bathing indications
The former first-party brand page listed general bathing indications for an alkaline simple spring. A current analysis has not been republished, and no treatment effect is promised.
The new brand opened August 3, 2026. Natural-bath hours are 06:00–01:00; adult 90-minute admission is ¥880 weekdays and ¥980 weekends/holidays. Full-time admission is ¥1,480 weekdays and ¥1,680 weekends/holidays. Tattoos require full coverage with up to two facility-issued seals.
How to read a bath profile
Spring-source temperature and actual bathing temperature are kept separate. Each score is shown independently for comparison rather than collapsed into one overall score.
