Bath
TypeNatural Hot Spring
Flow-through
A bicarbonate spring that leaves your skin feeling smooth. The view from the open-air bath is wonderful, and at night the sky fills with stars.
Chateraise Gateaux Kingdom Koumi Hoshizora no Yu
A spectacular open-air bath with a view of the stars, plus Chateraise ice cream
Nagano Koumi Town
Hoshizora no Yu is a bathing facility attached to Koumi Rieux Hotel (Chateraise Gateaux Kingdom Koumi). Of the baths that switch between men and women daily, only the Iwa no Ofuro side is equipped with a high-temperature sauna and a cold plunge bath. The spectacular views from the open-air bath at an elevation of 1450m and the star-filled night sky are magnificent, making for an exceptional outdoor air bath. As an added treat after bathing, you can also enjoy all-you-can-eat Chateraise ice cream.
Hot Spring & Bath Information
Bath
TypeNatural Hot Spring
Flow-through
A bicarbonate spring that leaves your skin feeling smooth. The view from the open-air bath is wonderful, and at night the sky fills with stars.
Sauna
Dry Sauna
82°CSauna TypeDry Sauna
Stove TypeBuilt-in Stove
Capacity8people
Men'sWomen's
A bouna sauna on the Iwa no Ofuro side. It has a solid heat, and in the compact room you'll work up a sweat in no time. (Alternates daily between men and women.)
Cold Bath
Cold Plunge Bath
20°CWater QualityTap Water
Capacity4people
Men'sWomen's
A cold plunge bath on the Iwa no Ofuro side. The water temperature is mild, so combining it with a cold shower is also recommended.
Business Hours
Monday
06:30〜23:00
Tuesday
06:30〜23:00
Wednesday
06:30〜23:00
Thursday
06:30〜23:00
Friday
06:30〜23:00
Saturday
06:30〜23:00
Sunday
06:30〜23:00
Holiday
06:30〜23:00
Closed Days: None
Address
384-1100 Toyosato Matsubarako Kogen, Koumi Town, Minamisaku District, Nagano Prefecture
Hotel & Ryokan
Gender Access
Gender Separated
❓
Tattoo Policy
Unknown (Please Check)
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