Keizan Day-Use Onsen: Arrive Before 4 pm to Get More Than a Quick Soak
Keizan’s day-use bath in Isawa runs 11 am–5 pm, with last entry at 4. See the ¥1,500 fee, towel policy and why you should call first.
Checked: September 27, 2026
Keizan is close to Isawa-Onsen Station, but its day-use window is easy to misread if you look only at the 5 pm closing time. The last admission is 4 pm. Come around 11 am or early afternoon if you want enough time for the baths and sauna; arriving at 3 pm leaves a much shorter visit for the ¥1,500 adult ticket.
Rates, towels and the call-ahead rule
Keizan lists adult admission at ¥1,500, elementary-school children at ¥1,050 and children aged three through preschool at ¥750. Towels are not included; bring your own or ask about buying them. The day-use page says admission may be unavailable depending on the day’s situation and asks visitors to check by phone before coming. This is more important if you are travelling specifically for the bath than if you happen to be nearby.
The hotel’s published facilities include indoor and outdoor baths, a dry sauna and a mist sauna. The baths rotate between men and women, and Keizan’s page notes that overnight guests can experience all the baths; a shorter day visit should be planned around the side available on that date. Tattoos are not permitted in the public baths or outdoor baths under the hotel’s posted rule.
Keizan describes its spring as its own source, free-flowing, alkaline simple spring water, with heating also used. Those statements can both be true; “free-flowing” here does not mean the water is never heated. The hotel does not publish a full treatment table for every tub.
Getting there
The station’s south exit is about a five-minute walk away. Keizan also offers a station shuttle by prior contact, but walking is the simplest route for day visitors unless the hotel confirms a pickup. Free parking is across from the main entrance for drivers.
For a comparison with other Isawa baths, see the Isawa day-use guide. If you want to choose by two different visit lengths instead, Kagetsu’s morning and afternoon sessions follow a different schedule.
