Seto, Shirahama, Wakayama Prefecture
Matsunoyu
A quiet, low-cost communal bath near Shirahama Bus Center, well suited to a short soak rather than a full spa visit.
Check before bathing
- Access
- About a 5-minute walk from Shirahama Bus Center. The tourism association notes that Seto Bay and Engetsuto can be seen on a walk outside the bathhouse; this is not a confirmed view from the baths.
Spring & water temperature
- Spring-source temperature
- 66.8°C in the Kinu-yu spring layer; not a bath temperature.
- Bathing temperature
- Not published.
- Spring source
- Kinu-yu spring.
- Spring classification
- Sodium chloride spring, based on the Kinu-yu source data.
- pH
- 7.2 in the Kinu-yu source-layer data.
- Flow rate
- 171 L/min in the Kinu-yu source-layer data; this is not Matsunoyu's measured share.
- Water handling
- The current tourism-association page confirms that Matsunoyu uses Kinu-yu. Water addition, heating, circulation, disinfection and whether its treatment matches Shirarayu have not been published for this bathhouse.
Bathing indications
A current bathing-indications list for Matsunoyu itself was not obtained. Indications from other baths using the same spring are not substituted.
The 66.8°C, pH 7.2 and 171 L/min figures describe Kinu-yu source data; they do not establish Matsunoyu's bath temperature or the flow allocated to the facility. The outside view of Engetsuto mentioned by the tourism association is not a confirmed bath view.
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.
