This hot spring facility draws natural hot spring water from within the hotel grounds.
In the “Onsen Zone,” guests can enjoy indoor baths, open-air baths, and a steam sauna using natural hot springs, while admiring the beauty of the forest that changes with each season.
Surrounded by the breath of nature and wrapped in the gentle warmth of the spring water, guests are invited to a blissful moment of relaxation.

※Forest Hot-Spring and the fitness room are exclusively available for guests staying at Karuizawa Prince Hotel East, The Prince Karuizawa, and The Prince Villa Karuizawa.
Guests staying at Karuizawa Prince Hotel West cannot use these facilities.
※Not available before check-in.
※After check-out, guests may use the facility until 3:00 P.M. for ¥1,500 per person (once per stay).
Changing Room Amenities
Men: Lotion, moisturizing milk, tissues, hairbrush, cotton swabs, razor, hand soap, negative ion hair dryer
Women: Cleansing, cotton, moisturizing lotion, moisturizing milk, cotton swabs, hairbrush, tissues, hand soap, negative ion hair dryer
Usage Rules & Notices
・Towels are available for rental at the reception desk.
・Boys aged 7 and above must use the men’s bath, while girls must use the women’s bath.
・Please wash your body before entering the bath.
・Before leaving the bathing area, please thoroughly dry your body with a towel.
・To maintain cleanliness, please do not put towels or shampoo in the bath.
・Please do not bring food, drinks, magazines, or similar items into the bathing area.
・Please be cautious as the floor may be slippery.
・Please take care not to lose the locker key. In case of loss, a compensation fee of ¥3,000 will be charged.
・When using the open-air bath, please be aware of the temperature difference with the outside air.
・We cannot be held responsible for injuries or accidents caused by the negligence of guests within the premises. Please understand this in advance.
・Please refrain from using the hot springs if you are wearing diapers.
・Please refrain from wearing swimwear or any other clothing inside the bathing area.
・Guests with bathing contraindications are strictly prohibited from using the hot springs.
・Swimming, diving, using floatation devices or beach balls, and the like are strictly prohibited.
・Cameras and electronic devices with cameras (smartphones, mobile phones, etc.) are not allowed.
・We strictly refuse entry to and use of our facilities by members of antisocial groups.
※We may refuse entry to customers with tattoos.
If such individuals are found, please understand that they will be immediately asked to stop using the facilities and leave the premises.
・Individuals who engage in violent acts, behave in a manner that violates public order and morals,
or act in a way that causes discomfort to other guests will be promptly asked to leave the premises.