Ueno, Kumagaya, Saitama Prefecture
Kumagaya Natural Onsen Hanayu Spa Resort
A leading choice in Kumagaya if you want a natural-spring soak with a half- or full-day stone-spa and relaxation plan. There is a free shuttle from Kumagaya Station, but decide on your return time before staying late.
Check before bathing
- Opening hours
- 10:00–23:00; last admission 22:30. Adult admission is ¥950 on weekdays, ¥1,100 on weekends and holidays, and ¥1,150 on special dates. Entry after 21:00 is ¥100 less. The separate Onkatsu Cafe Nest costs ¥800 on weekdays, ¥900 on weekends and holidays, and ¥950 on special dates; ages 13 and up only. Special-date pricing applies 19–23 September 2026. Maintenance closure is announced for 27–28 October 2026.
- Access
- A free shuttle runs from Kumagaya Station. Check the return timetable before a late visit.
- Tattoo policy
- Tattoos are not permitted. No cover-seal exception is listed.
Spring & water temperature
- Spring-source temperature
- Not published as a current value.
- Bathing temperature
- Not published as fixed figures.
- Spring source
- The facility's own spring, from about 1,500 metres beneath its Ueno site.
- Spring classification
- Simple hot spring.
- pH
- Not published in current first-party information.
- Flow rate
- The facility reports 300 L/min of spring water used, not a measured source yield. A precise yield is not confirmed.
- Water handling
- The facility says all of its hot-spring pools use 100% of its own spring on a source-flowing basis. The cold bath uses 100% groundwater. It does not publish a complete pool-by-pool table for water addition, heating or disinfection, so no unlisted treatment details are inferred.
- Analysis date
- 2026
Bathing indications
General bathing indications are listed for the spring; they are not a treatment guarantee.
Tattoos are prohibited. Check the shuttle schedule and dated special pricing or closure notices before travelling.
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.
