Yokoze, Chichibu District, Saitama
Chichibu Yumoto Buko Onsen
A practical stop for a low-cost soak and sauna near Yokoze Station. The operator lists a strongly alkaline sulfur spring in its outdoor and cypress baths, while the cold plunge uses Chichibu groundwater. Tattoo admission is possible only if fully covered with the facility's specified seal.
Check before bathing
- Opening hours
- 10:00–21:00; last admission 20:30. Usually open daily, but maintenance closures may occur.
- Tattoo policy
- Tattoos are generally not allowed. Entry is permitted only when fully covered with one of the facility's specified 11 × 20 cm cover seals, sold for ¥220 including tax. Guests wearing diapers may not use the bathing area.
Spring & water temperature
- Spring-source temperature
- Not published.
- Bathing temperature
- Not published.
- Spring source
- Buko Onsen; the current operator page does not give a more specific source name.
- Spring classification
- Simple sulfur spring, alkaline, pH 11.1.
- pH
- 11.1.
- Flow rate
- Not published.
- Water handling
- The operator lists natural spring water in the outdoor, cypress and rock baths. It does not publish treatment details for each pool, so the whole facility should not be described as source-flowing. The cold plunge uses Chichibu groundwater.
The special tattoo cover seal must fully conceal the tattoo and meet the specified 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.
