Karurusu Onsen, Noboribetsu, Hokkaido
Mori-no-Yu Sansenkan (Day Use)
Compare pure-source and diluted free-flowing baths, then step outside
Property overview
Overview
Sansenkan has one 100% source-fed pool and one diluted free-flowing pool in each indoor bath area, plus the 100% source-fed Mori-no-Yu outdoor bath. It also permits drinking the spring water. There is no day-use lounge or restaurant, and the property is reached by a mountain road.
Spring & water temperature
- Spring-source temperature
- The inn cites 52°C for the Karurusu area; an individual Sansenkan source temperature is not identified
- Bathing temperature
- Not published; the inn says its 100% source-fed pool is the hottest
- Spring source
- Karurusu Onsen water; the current pages do not name Sansenkan's individual source
- Spring classification
- Simple spring; the inn describes Karurusu water as clear, colorless and odorless, with a regional pH of 7.2
- pH
- 7.2 in the inn's overview of Karurusu Onsen; not confirmed as an individual sampling-point analysis for Sansenkan
- Flow rate
- About 1,200 L/min in the inn's regional overview; not Sansenkan's individual yield
- Water handling
- Each indoor bathing area has one 100% source-fed pool and one diluted free-flowing pool. The Mori-no-Yu outdoor bath is also 100% source-fed. Showers use heated water. The inn permits drinking the spring water; follow its posted serving guidance.
Bathing indications
The inn lists general bathing and drinking indications. It advises drinking 100–200 ml at a time, up to 200–1,000 ml per day; consult a doctor if drinking for a health condition. This does not guarantee treatment.
Day use runs until 20:00, with last admission around 19:30. Adult admission is ¥600; children aged three through elementary school ¥300; under three free. Towel rental and sale are ¥200 each. No day-use lounge or restaurant is listed. Regional pH, temperature and yield are not property-specific measurements.
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Check the official page for current room details and what the selected plan includes.
Meals
Check meal times before booking.
For allergies or other dietary requirements, contact the property before booking to confirm what can be accommodated.
How ryokan meal plans workLocation & access
Check the last leg of the journey.
About 20 minutes by car from JR Noboribetsu Station. The inn lists a reservation-only free shuttle, but its day-use availability is not confirmed; do not assume it is included.
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