Katsuura Onsen, Nachikatsuura, Wakayama Prefecture
Hamayu Natural Hot Spring Public Bath
A low-cost choice near the station if you want sulfur-bearing, source-flowing water and a traditional hot communal bath. It is not the place for extensive facilities or complimentary toiletries.
Check before bathing
- Opening hours
- 15:00–21:00. Closed Sundays and Tuesdays. Opening hours may change, so call ahead if timing is tight.
- Tattoo policy
- The current first-party information reviewed does not confirm a tattoo policy. Ask the bath before visiting.
Spring & water temperature
- Spring-source temperature
- 46.3°C.
- Bathing temperature
- Not published as a fixed value.
- Spring source
- Hamayu spring, Katsuura Onsen.
- Spring classification
- Sulfur-bearing sodium-calcium chloride spring; mildly alkaline, low-salinity and hot.
- pH
- Not published in the current material summarized here.
- Flow rate
- Not published in the current material summarized here.
- Water handling
- The bath uses source-flowing water. The Wakayama Onsen Association says a small amount of water may be added during summer temperature adjustment; no heating is used, and the bath is drained and refilled daily.
Bathing indications
The official tourism page lists general bathing indications for the spring. These are not treatment guarantees.
The bath is source-flowing. The association says a small amount of water may be added in summer for temperature adjustment; no heating is used, and the bath is changed daily.
The current tourism page lists admission at ¥490 for adults, ¥170 for elementary-school children and ¥100 for preschoolers. The Onsen Association still shows an older ¥400 price. Shampoo and other toiletries are not provided.
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.
