Hot Springs & Sauna
Your own open-air hot spring bath.
A sauna facing the mountains.
Time to enjoy both, at your own pace.
An open-air hot spring bath
overlooking Mount Makihata.
Step into your private open-air onsen—a natural hot spring bath—and look across the valley towards Mount Makihata. Morning mist, changing light and a clear night sky make each soak feel different. The indoor bath has mountain views too.
The slightly saline hot spring water comes from Echigo Yukiguni Onsen and has a different mineral composition from the water at the main Satoyama Jujo hotel. Towels, bathrobes and ponchos are provided at Izumi, so you can move easily between the house, bath and sauna.
A private sauna
with panoramic mountain views.
The sauna controller measures the temperature near the ceiling. At its usual setting of 100°C, the temperature is approximately 85°C at head height when seated and 75°C at the bench. Lower settings offer a gentler experience.
You can add water to the hot stones to create steam, a Finnish sauna practice called löyly. Aroma options are also provided. Please follow the instructions in the sauna for adjusting the temperature and using water and aromas. The cold plunge is continuously supplied with well water at approximately 14–15°C.
If you do not plan to use the sauna, check the official booking options for a stay without sauna access and the applicable rate.
The Panoramic Sauna
The sauna comfortably seats four guests. Its cold plunge is a deep ceramic tub made in Shigaraki, a Japanese pottery town, and is continuously supplied with well water. Privacy from the surrounding area is reduced between the snowmelt and the return of spring foliage, usually from late March to late April. Please bring swimwear if you would prefer additional coverage.
Swimwear is not provided. Ponchos are available.
- Capacity 4 guests
-
Sauna temperature
Controller: 100°C
Approx. 85°C at seated head height; 75°C at the bench - Steam Add water to the hot stones yourself (löyly)
- Cold plunge Approx. 14–15°C
- Relaxation space 2 reclining loungers
Outdoor Bath
Izumi is the only house in The House Collection supplied with natural hot spring water. Its water differs from Satoyama Jujo’s and contains salt, leaving you wonderfully warm. The left side of the open-air bath in these photographs felt too exposed to some guests, so low shrubs have since been planted there. The view on that side is now a little more sheltered, but the panorama to the right remains wide open. Enjoy this spectacular hot spring in complete privacy.
- Hot spring sourceEchigo Yukiguni Onsen
- Water typeSodium chloride hot spring water
Official classification: hypotonic, mildly alkaline, high-temperature spring - Total mineral content1,619 mg/kg
- Source extractionA drilled spring that flows naturally
Amanogawa Hot Spring Baths
at SATOYAMA JUJO
Guests of The House Collection may also use Amanogawa, the shared hot spring baths at Satoyama Jujo, about 10 minutes by car from Izumi. Transport is not provided for bathing visits alone. If you are dining at Satoyama Jujo, a dinner transfer is available; you may wish to enjoy the baths before your meal.
Amanogawa Hot Spring BathsOpening hours
3:00 pm to 10:00 am the following day