East shore of Lake Biwa, Moriyama, Shiga Prefecture
Moriyama Yumoto Suisyun, Pieri Moriyama
A well-balanced day trip if you want natural spring water, sauna and Lake Biwa views without a car. Towels are not included in basic admission, and privacy glass limits the women's outdoor-bath view.
Check before bathing
- Opening hours
- Monday–Saturday 10:00–24:00; Sundays and public holidays 07:00–24:00. Last admission 23:30.
Spring & water temperature
- Spring-source temperature
- 34°C, the spring-source temperature; the facility recorded sunny weather and an air temperature of 20°C at measurement.
- Bathing temperature
- Not published.
- Spring source
- Biwa-ko Bijin-no-Yu natural spring.
- Spring classification
- Sodium chloride–bicarbonate spring.
- pH
- Not published.
- Flow rate
- Not published.
- Water handling
- The facility identifies the open-air panoramic bath as source-flowing and also uses natural spring water in Sazanami-no-yu and the natural-spring pot bath. Its super-carbonated and carbonated reclining baths are artificial carbonated features, not the natural spring. Full treatment conditions are not published for each pool.
Bathing indications
The facility lists spring-specific indications including cuts, peripheral circulation problems, sensitivity to cold and dry skin. These are not a treatment guarantee.
Basic admission does not include towels. The heated-stone area costs an additional ¥800 on weekdays and ¥900 on weekends and public holidays. The women's outdoor bath has frosted privacy glass around its outer edge, so promotional views of the men's bath should not be assumed to match.
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.
