Nagano Karuizawa Town
A superb Karuizawa retreat where natural onsen water fed straight from the source and forest spring water bring on totonou, a state of deep relaxation
Hoshino Onsen Tombo-no-Yu is a day-use onsen bathhouse in Karuizawa, Nagano. Here you can luxuriate in a celebrated natural onsen, loved by many writers and artists since the Taisho era, fed straight from the source, never recirculated. After a long, slow sweat in the Bona sauna, where soft steam fills the room, the cold plunge of spring water from the Wild Bird Forest cools you down crisply. In the open-air bath surrounded by trees and the high-ceilinged indoor bath, you can feel at one with nature through the seasons. After your bath, spend a blissful moment at the adjoining café with a craft beer in hand, taking in the clear Karuizawa air.

A natural onsen fed straight from the source, never recirculated and with no water added, loved by many writers and artists since the Taisho era. The baths are filled with fresh water every day and overflow with a “bath for beautiful skin” that removes dead skin cells and leaves the skin moist and supple. In the high-ceilinged indoor bath, built generously with hinoki and natural stone, and the airy open-air bath lined with large granite boulders, you can enjoy a blissful soak that makes you feel at one with the surrounding woods and the changing seasons.

In the Bona sauna, soft indirect lighting creates a modern mood, and water is poured onto the heat source at regular intervals, spreading gentle steam through the room. You give yourself over to quietly playing jazz and Karuizawa’s seasons beyond the window, and once you have worked up a pleasant sweat, the cold plunge, lavishly fed with flowing spring water from the Wild Bird Forest, gently envelops your body. After a crisp, refreshing cool-down, move on to cooling off in the open air in the clear highland breeze. You are drawn into a deep relaxation, as if melting into the great outdoors.
Hotels and ryokan we feature, within 10 km in a straight line.
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Irregular Holidays
Bathing is permitted only if the tattoos can be covered with eight of the designated cover stickers (10 × 8 cm (3.9 × 3.1 in)) sold at reception.
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