Sodegaura, Chiba Prefecture
Yubune Natural Onsen, Sodegaura
One of the easiest late-evening natural-spring options around Tokyo Bay for car-free visitors on a modest budget.
Facility photos
Check before bathing
- Tattoo policy
- Not permitted. The facility refuses entry to guests with tattoos, body painting or tattoo stickers, regardless of size.
Spring & water temperature
- Spring-source temperature
- Not published in current official text pages.
- Bathing temperature
- Fixed temperatures for the natural-spring baths are not published.
- Spring source
- Yubune Sodegaura's own natural spring.
- Spring classification
- Iodine-bearing sodium chloride spring (high-tonicity, weakly alkaline, cool spring).
- pH
- Not published.
- Flow rate
- Not published.
- Water handling
- The current official page distinguishes the natural-spring baths from its highly carbonated bath, pot bath, reclining bath, jet baths and cold bath. Water addition, heating, circulation and disinfection are not fully published for every natural-spring pool; the whole facility is not described as source-flowing.
Bathing indications
The facility lists general bathing information for its natural spring. This is not a medical treatment guarantee.
Adult admission is ¥1,000 on weekdays and ¥1,200 on holidays. A towel set costs ¥360, bringing a no-towel visit to about ¥1,360 or ¥1,560 respectively. Tattoos, body painting and tattoo stickers are prohibited regardless of size.
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.
