Kose Onsen is a 3-star hotel in Karuizawa, Japan, located about 2.9mi from the city center. The address is Nagakura 2126, and the property has 129 reviews.

Featured amenities include free private parking, free Wifi, air conditioning, free on-site parking, free hot spring bath, mountain view, garden, free toiletries, and a bathtub.

Set against a mountain backdrop with a garden to explore, this spot blends relaxation with nature for travelers seeking a quiet stay in Karuizawa.

Set against a mountain backdrop with a garden to explore, Kose Onsen invites travelers to slow the pace and savor simple pleasures. A free hot spring bath lingers as a serene highlight, while mountain views and tranquil grounds encourage leisurely strolls. Practical comforts—free private parking, free Wifi, and air conditioning—keep everything breezy after days of Karuizawa exploration.

Varied accommodations abound, from the Standard Room (Twin) at about 140 square feet, which accommodates 2 adults and 1 child with two twin beds, to a range of Japanese Style options and suites. Options include a Junior Suite and a Suite, plus Japanese Style configurations such as a Quadruple, Single Use layout with four futon mats, and other Japanese Style rooms suitable for different group sizes. A Double Room with Panoramic View offers a different angle on the surrounding scenery.

Payment is convenient with American Express, Visa, Mastercard, Diners Club, JCB, NICOS, and UC accepted; cash is not accepted. The property has 129 reviews, offering insight from past travelers and painting a picture of a mountain retreat where nature and relaxation mingle in Karuizawa.