Midorimachi, Matsuyama, Ehime Prefecture
Kotobuki Onsen
A central-city sento with confirmed natural spring water drawn from Okudogo, plus both dry and spring-mist saunas. The cold bath uses well water, not the hot spring.
Check before bathing
- Opening hours
- 07:30–23:00; irregular closing days. Adult admission ¥510, middle-school students ¥200 and younger children ¥100. Cash, PayPay and Machipay accepted. Soap and shampoo are sold at the front desk, not supplied in the bathing area. Parking for five cars; if full, the operator says it will subsidize ¥100 at a nearby paid lot. The current operator hours take precedence over older association listings of 06:00–23:00 daily.
- Tattoo policy
- The current profile does not confirm a tattoo policy; ask the bath before visiting.
Spring & water temperature
- Spring-source temperature
- 32.5°C, according to the operator's current spring page.
- Bathing temperature
- Not published. The operator describes the medicinal and electric-bath area as feeling cooler, without giving a fixed temperature.
- Spring source
- Okudogo Onsen source; a more specific source name is not published.
- Spring classification
- Alkaline simple spring. The operator also notes that it is classed as an alkaline simple sulfur spring under therapeutic-spring categories.
- pH
- 9.1.
- Flow rate
- Not published.
- Water handling
- Spring water is drawn from Okudogo and used in the main bath and wash-station taps. The steam sauna uses spring-water mist. The cold bath uses well water, not the spring. Treatment details for each individual pool are not published.
The current operator lists adult admission at ¥510, while the general prefectural price cap for ordinary public baths is ¥500. The profile does not explain the difference, so no reason is inferred.
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.
