Hirocho, Minamiashigara, Kanagawa Prefecture
Modern Toji Only You
A good fit for adults who want to dial down the intensity of sauna sessions, spend time in the 38°C forest bath and cool off outdoors. The women's barrel sauna added in 2026 gives visitors another option. Less suited to a short stop, an unplanned visit relying on the shuttle, or anyone who needs a private family bath or fully accessible public bathing facilities.
Check before bathing
- Opening hours
- Day use is usually 10:00–20:00; last entry at 19:30.
- Access
- A free shuttle is available by reservation. Contact the facility at least a day ahead for the first departures, listed at 09:25 from Kaisei and 09:40 from Daiyuzan.
- Tattoo policy
- Conditionally permitted. The operator allows up to two tattoo cover seals, ¥330 each, provided they fully cover the tattoos. Its current FAQ gives two different maximum sizes, 15 × 7.5 cm and 15 × 10 cm; confirm the limit with the facility if yours is close to either size.
Spring & water temperature
- Spring-source temperature
- Not published. The 38°C and 42°C figures are bathing-pool temperatures, not source temperatures.
- Bathing temperature
- The forest open-air bath includes a roughly 38°C warm pool; another hot-spring pool is about 42°C. These are bath settings, not source temperatures.
- Spring source
- The facility's own natural spring, associated with geological strata formed about 15 million years ago. The current official pages reviewed do not give a separate well name.
- Spring classification
- Simple spring; alkaline, pH 9.5. This follows the current official bath page, not older third-party listings that classify it as a simple sulfur spring or give a higher pH.
- pH
- pH 9.5, as listed on the current official bath page.
- Flow rate
- Not published.
- Water handling
- The operator confirms natural spring water in the indoor baths and forest open-air baths. The facility lists a roughly 38°C warm pool and a roughly 42°C hot-spring pool. Current primary pages do not fully publish water addition, heating, circulation, disinfection or source-flow conditions for each pool, so none are inferred.
- Analysis date
- 2026
Bathing indications
The operator describes the water as a simple spring and uses wellness and skin-care language. This profile records the official classification without presenting bathing or sauna use as medical treatment.
Natural spring use is confirmed in the indoor and forest open-air baths. Full pool-by-pool treatment conditions are not published; the facility is not described as entirely source-flowing.
The official site announced a price revision on 26 August 2026, but its FAQ still shows older adult rates of ¥2,420 and ¥2,530. A current secondary listing checked on 5 September gives ¥2,530 on weekdays and ¥2,640 on weekends and public holidays, with lower rates after 17:00 and 18:30. Confirm the applicable price with the facility. Guests who are not toilet-trained may not enter the public bath pools. The public bathing area does not provide full barrier-free access.
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.
