Katsuura Onsen, Nachikatsuura, Wakayama Prefecture
Ichinotaki Hotel
A good-value source-flowing bath with a standard-temperature pool and a cooler pool. The published day-use hours and closing days conflict, so check before making the trip.
Check before bathing
- Opening hours
- The Nachikatsuura tourism organisation lists 15:00–23:00, ¥500 for adults and ¥300 for children, closed Monday and Tuesday except holidays, year-end and Obon. The onsen association lists 15:00–23:30 and Tuesday closure. Confirm the current schedule directly.
Spring & water temperature
- Spring-source temperature
- 38.8°C.
- Bathing temperature
- Two pools are offered, one at the standard temperature and one cooler; fixed temperatures are not published.
- Spring source
- Ichinotaki spring, Katsuura Onsen.
- Spring classification
- Simple hot spring; weakly alkaline and low-tonicity.
- pH
- No numeric value is published; the onsen association describes the spring as weakly alkaline.
- Flow rate
- 145 L/min.
- Water handling
- The hotel and onsen association describe the baths as 100% source-flowing. The association says no water is added, the water is heated to maintain a comfortable temperature, there is no circulation filtration, and the baths are fully drained and refilled daily.
Bathing indications
The hotel and association list general bathing indications. They are not a treatment guarantee.
The tourism organisation and onsen association publish different hours and closing days. Check directly, especially if travelling a long distance.
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.
