Yubara Onsen, Maniwa, Okayama Prefecture
Yubara Onsen Sunayu Riverside Bath
A free riverside landmark with three pools at different temperatures and a direct spring seep from the Asahi River bed. It is mixed bathing outdoors, so use the required swimwear or bathing wrap and do not count on it as a private or fully equipped bath.
Check before bathing
- Opening hours
- Normally open 24 hours and free to use. This is not a guarantee during high water, cleaning, events or safety restrictions. The current Yubara association guidance requires swimwear or a bathing wrap; separate changing rooms are provided. There is no dedicated car park; the riverside lot is about a 5-minute walk away.
- Tattoo policy
- The profile does not establish a separate tattoo policy. Swimwear or a bathing wrap is required for all users under the current association guidance.
Spring & water temperature
- Spring-source temperature
- Not published.
- Bathing temperature
- The three pools have different temperatures, but fixed figures are not published.
- Spring source
- Natural spring emerging from the bed of the Asahi River; no separate formal source name is published.
- Spring classification
- Alkaline simple spring, according to current Yubara Onsen area information. A facility-specific analysis is not published on the current Sunayu page.
- pH
- Not published for Sunayu. Do not substitute the area's general pH description.
- Flow rate
- Not published.
- Water handling
- Spring water rises through the riverbed sand and flows directly into three rock-lined outdoor pools. The current facility page does not publish full details on water addition, heating, circulation or disinfection.
Bathing indications
The spring name and general bathing information are for visitor guidance, not a guarantee of beauty or medical effects.
This is an exposed public riverside bath with mixed bathing and limited privacy. Swimwear or a bathing wrap is required; bring valuables under your own care. Normal 24-hour access can be interrupted by river conditions, cleaning, events or safety controls.
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.
