Why it may fit
- A considered choice for the Shirahata spring, a central Kusatsu location and a traditional inn stay. The unavoidable indoor stairs, room layout and public-bath tattoo rule may rule it out for some guests
- The inn lists bathing information for neuralgia, rheumatism, digestive complaints, haemorrhoids, gynaecological conditions, recovery after illness, muscle pain and skin conditions. This is not a treatment claim
Trade-offs to check
- The inn describes the water as strongly acidic and advises sensitive guests and families with young children to consider this before bathing. Its main baths are about 41–42°C. Stairs between rooms and the baths cannot be fully avoided
- The public bath generally does not admit guests with tattoos. Small tattoos may be covered completely with a cover sticker; paid private open-air baths are available. This is Naraya’s policy, not a rule for every Kusatsu facility
Bathing scores
Comfort8.5/10
Bath variety8.0/10
Visible upkeep9.0/10
Atmosphere8.0/10
Quiet7.5/10
Access8.5/10
Value8.0/10
Spring, water and bathing dataView bathing details
- Spring source
- Shirahata spring
- Spring classification
- Acidic sulfur–aluminium–sulfate–chloride spring, following the inn’s Japanese classification
- pH
- Not published. The inn’s current main pages do not give a precise pH for the Shirahata source
- Water handling
- Water is channelled by natural slope to the bath hut, held to cool, then adjusted at each bath using the outlet flow. The inn states that the main baths use flowing spring water around the clock; its three paid private open-air baths also use Shirahata spring water. Only the Iwakagami room is specifically listed as having its own half-open-air spring bath
- Water treatment: dilution, heating, circulation & disinfection
- Gravity-fed to the bath hut; held overnight to cool from 55–56°C to 46–47°C, then adjusted toward a 41–42°C bathing temperature by changing the outlet flow. The inn lists its main baths as continuously supplied with flowing spring water; other baths are not assumed to share that arrangement
- Spring-source temperature
- 55–56°C (Shirahata spring at the inn)
- Bathing temperature
- 41–42°C (target temperature for the main baths)
- Natural spring use
- The two main bath areas switch between men and women overnight. Three paid private open-air baths use Shirahata spring water. The Iwakagami room is specifically listed with a half-open-air bath supplied by the spring
Bathing information
The inn lists bathing information for neuralgia, rheumatism, digestive complaints, haemorrhoids, gynaecological conditions, recovery after illness, muscle pain and skin conditions. This is not a treatment claim
Evidence source IDs
Tattoo policyThe public bath generally does not admit guests with tattoos. Small tattoos may be covered completely with a cover sticker; paid private open-air baths are available. This is Naraya’s policy, not a rule for every Kusatsu facility
Check again before booking
Room type, bath access, water treatment, prices and cancellation terms can vary by plan. Confirm the details on the property’s booking page before you reserve.
Details last checked: 2026-09-08
