Kisarazu, Chiba Prefecture
Ryugujo Spa Hotel Mikazuki
A large Tokyo Bay resort for a half- or full-day family outing, but lower it on the list if natural spring bathing is the main reason for your visit: some spring-water supply was suspended in the latest profile.
Check before bathing
Spring & water temperature
- Spring-source temperature
- Not published in the current official text pages reviewed.
- Bathing temperature
- Current fixed temperatures for the natural-spring pools are not published.
- Spring source
- Natural-spring baths at the Kisarazu-area resort; the current official pages announce that supply to some pools is suspended.
- Spring classification
- A precise chemical classification could not be confirmed from the current official text pages reviewed on 7 September 2026.
- pH
- Not published.
- Flow rate
- Not published.
- Water handling
- The resort describes Nagisa-no-yu as a natural-spring bath, but announced that from 20 March 2026, spring-water supply to some pools that had previously used it was stopped for emergency maintenance. The large bath remained open. No restoration date was published in the reviewed profile, so earlier natural-spring coverage is not applied to every pool as of 7 September.
Bathing indications
The resort offers a large bath that includes natural-spring pools, but no personal health effect is guaranteed.
Prices vary by date and event. The 2026 standard one-day rate listed was about ¥2,200 on weekdays and ¥3,300 on weekends and public holidays; towel set ¥550. The entire facility was scheduled to close from 8–10 September 2026, with free shuttle service suspended. The 7 September profile listed the resort as open while some spring supply remained suspended; confirm current notices.
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.
