At our hot bath facility, Tenku Spa, we capture Asama-originated natural pure water flowing from the surrounding mountains of Kita-Karuizawa to continually refresh our bath.
Main bath area has an open-air outdoor jet bath, facing the magnificent Mt. Asama, providing views over breathtaking highland scenery as well as a cypress hot tub and a cold tub with a dry sauna with the scent of natural cypress. Our Tenku Spa experience gives you exclusive use of cypress-lined hot tubs, surrounded by beautiful forests and magnificent views, allowing you to relax in nature.


Private Jet Bath Whirlpool Room

If you want to spend time in private, the private jet bathtub is your best option.
Ideal for individuals or groups of 4 people.
You will have 90 minutes to soak.
*Additional charge applied


Opening Hours (for Villa-stay Guests)

15:00-23:00 (Last Entry 22:30)
6:00-10:00 (Last Entry 9:00)
*For villa-stay guests only

Opening Hours (for Walk-In Visitors)

12:00~18:00 (Last Entry 17:00)
*Private jet bath until 21:00
Closed: TUE&WED (except public holidays)

Price List (for Walk-In Visitors)

 Adult 2,000 yen
 Child 1,000 yen (Age 3 to 12)

Private bath (up to 4 people)
90 minutes 4,800 yen per room
No reservation required
*Rental of bath towels and face towels are included in the package
*All prices are tax included.

Please take note that we only accept credit card and electronic payment. We do not accept cash, thank you.