A hot bath facility that uses Asama natural spring water flowing through Kita-Karuizawa.
The large public bath offers a view of the majestic Mt. Asama and features an open-air bath where you can enjoy the soothing sunlight filtering through the trees, along with a sauna scented with natural hinoki cypress.
Shed the stress of daily life and relax both your mind and body.
Mr.Asama Mineral Water
Kita-Karuizawa and Tsumagoi are renowned for their abundant sources of famous spring water in Japan.
At Tenku (Sky) Spa, we use "Asama Natural Spring Water," sourced from underground water in the foothills blessed by the great outdoors. Our baths are also known as "the beauty and skincare bath."
Main Features
- Soft and gentle on the skin, this water produces a rich lather with soap and shampoo, leaving hair and skin feeling smooth without any tightness after bathing.
- Activates skin metabolism with the power of nature, promoting blood circulation and making it less likely for the body to cool down quickly after a bath.
- Low in irritation, making it suitable and reassuring for those with atopic skin, sensitive skin, or dry skin.
Facilities Guide
Large Public Bath
-
Indoor Bath
A spacious indoor bath made from natural hinoki cypress, generously using the soft Asama natural spring water.
Enjoy the detoxifying relaxation effects of the bath. -
Hinoki-Scented Sauna
In our traditional dry sauna, you can experience "Löyly" by pouring aromatic oils or Asama natural spring water over sauna stones.
｜Capacity: 4 people｜Temperature: 90°C｜ -
Forest Outdoor Air Bath
with a View of Mt. Asama
After the sauna, relax in the smooth water bath and enjoy outdoor air bathing on deck chairs amidst the clear air and great nature of Kita-Karuizawa. Unwind peacefully and harmoniously.
Private Baths
-
Private Reserved Rooms
"SORA" and "NOZOMI"
For those who wish to enjoy private time or use the facilities with small children, we offer private reserved rooms with jet baths.
｜For 2 to 4 people｜2 rooms｜
Operation Hours
"Tenku (Sky) Spa"
For Day-Use Guests
- Indoor Bath, Outdoor Bath (Jet Bath), Water Bath, Sauna
12:00 PM – 6:00 PM
[Last Entry] 5:00 PM - Private Reserved Rooms
12:00 PM – 9:30 PM
[Last Entry] 8:00 PM
Closed Days: Irregular (Open daily in July and August)
Please check the operating calendar for details.
[Asama Kuzanbo]
Exclusive Hours for Staying Guests
- Indoor Bath, Outdoor Bath (Jet Bath), Water Bath
- 6:00 PM* – 11:00 PM
[Last Entry] 10:30 PM - (the following morning) 6:00 AM – 10:00 AM
[Last Entry] 9:00 AM
- 6:00 PM* – 11:00 PM
- Sauna
6:00 PM – 11:00 PM
[Last Entry] 10:30 PM
For First-Time Guests
"Tenku (Sky) Spa"
Price List (for Walk-In Visitors)
Includes face towel and bath towel rental
- Large Public Bath
Indoor Bath, Outdoor Bath (Jet Bath), Water Bath, SaunaAdults(Junior high school students and older) 2,000 yen (tax included) Children（Ages 3 to 12） 1,000 yen (tax included) - Private Reserved Rooms
Separate pricing from the large public bath
*No reservation required90 minutes (up to 4 people) 1session 4,800 yen/room (tax included)
Please purchase a ticket at the vending machine next to the spa entrance.
Credit cards and electronic money are accepted.
Please note that cash payments are not accepted.
[Asama Kuzanbo]
For Staying Guests
- Large Public Bath
Indoor Bath, Outdoor Bath (Jet Bath), Water Bath, Sauna
You can use these facilities free of charge.
Towels and amenities are provided. - Private Reserved Rooms
Available at a special rate.
Please inquire for more details.
