Ultimate ForestSauna Experience
At 1,000m elevation and 5°C cooler than the city, the deep forest of Kitakaruizawa is all yours.
In a completely private space, escape the summer heat with cool outdoor air and a natural spring water bath —
luxurious moments becoming one with nature.
THE FOREST SAUNA
Your Own
Forest Retreat
THE FOREST SAUNA is a private villa nestled in the highland forest of Kitakaruizawa at ~1,000m elevation. Even in midsummer it averages 24–25°C — a cool retreat 5°C below the city. Sweat it out in the state-of-the-art barrel sauna, plunge into the cold natural spring water bath, and cool off in the forest shade. An extraordinary summer to reset your mind and body, far from the city heat.
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Features
Features of THE FOREST SAUNA
Barrel Sauna
Finnish HARVIA barrel sauna. Adjust temperature to your liking with self-löyly.
Natural Spring Bath
Natural spring water bath in the forest. Ultimate air bathing with infinity chairs.
Private Space
Entire villa exclusively for you. Special time with no interruptions.
BBQ Facilities
Free BBQ set rental. Charcoal included for easy outdoor cooking.
Villa List
THE FOREST SAUNA List
北軽井沢北軽井沢
群馬県吾妻郡嬬恋村
Coming SoonTHE FOREST SAUNA 北軽井沢 薫 Kaori（2026年夏オープン予定）THE FOREST SAUNA 北軽井沢 薫 Kaori（2026年夏オープン予定）
群馬県吾妻郡嬬恋村
Guide
How to Enjoy Kitakaruizawa & Tsumagoi
Discover seasonal sauna experiences, access information, and nearby attractions.
Experience the Ultimate
Relaxation in the Forest
Spend your special time
at THE FOREST SAUNA.