Tawarayama Onsen, Nagato, Yamaguchi Prefecture
Hakuen-no-Yu, Tawarayama Onsen
A good choice for an outdoor bath, a spacious bathing area and an easy-to-visit facility. Keep the source-flowing No. 1 bath distinct from the five-source blend used in the No. 2 bath and outdoor bath.
Facility photos

Check before bathing
- Opening hours
- 12:00–21:00. Normally closed Tuesday through Thursday; operating days may change, so check the latest calendar.
Spring & water temperature
- Spring-source temperature
- 41.1°C for Kawa-no-yu (2013 analysis); no single source temperature is published for the five-spring blend used by Bath No. 2 and the outdoor bath.
- Bathing temperature
- No fixed pool temperature is published.
- Spring source
- Kawa-no-yu spring in Bath No. 1; a blend of five Tawarayama springs in Bath No. 2 and the outdoor bath.
- Spring classification
- Alkaline simple hot spring (low-tonicity, alkaline). Kawa-no-yu's analysis dates to 2013.
- pH
- 9.9 for Kawa-no-yu (2013 analysis). The district-wide pH 9.8 is a separate figure and is not substituted for this facility.
- Flow rate
- Not published.
- Water handling
- Bath No. 1 uses source-flowing Kawa-no-yu. Bath No. 2 and the outdoor bath use a blend from five Tawarayama springs. Current main text pages do not fully publish water addition, heating, circulation or disinfection details pool by pool.
- Analysis date
- 2013
Bathing indications
The facility lists general bathing indications including neuralgia, muscle and joint pain, and fatigue. This is not a personal treatment or skin-care guarantee.
Do not apply Kawa-no-yu's 41.1°C and pH 9.9 figures to the mixed water in Bath No. 2 or the outdoor bath. The district-wide pH 9.8 is not a facility-specific value. The facility is normally closed Tuesday through Thursday, but operating days may change.
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.
