An open, restorative moment to unwind body and mind with a variety of open-air baths and a high-concentration carbonated spring.
Ibaraki Koga City
A super sento with a wide range of baths on a spacious site. You can enjoy as many as 12 different baths, combining indoor baths and open-air baths. The high-concentration artificial carbonated spring is especially expected to help promote blood circulation. With a cold plunge bath using binchotan charcoal and two types of sauna, the sauna facilities are also well equipped. There is also a ganbanyoku stone sauna and a dining area, making it a relaxing healing space rooted in the local community where you can spend the whole day at ease.
Sauna TypeDry Sauna
Stove TypeInfrared Heater
Capacity20people
A stadium-style sauna with tiered seating, where you can choose your preferred temperature zone and warm up slowly. The far-infrared effect heats you from deep within and efficiently promotes perspiration.
Sauna TypeSalt Sauna
Stove TypeInfrared Heater
Capacity10people
A low-temperature sauna where you rub salt into your skin, with expected benefits for removing waste products and improving skin condition. In the mild heat, you can enjoy detoxing at a leisurely pace.
Water QualityCharcoal Filtered Water
Capacity5people
A gentle cold plunge bath whose water has been purified by binchotan charcoal lining the walls. It makes the cool-down after sauna even more refreshing.
Closed Days: None
306-0056 Ibaraki Prefecture, Koga City, Sakama 185-1
Gender Access
Gender Separated
Curated by an expert who visits onsen and sauna facilities every day and has explored 300+ locations — only facilities confirmed to be truly exceptional are featured.
Learn more
An open, restorative moment to unwind body and mind with a variety of open-air baths and a high-concentration carbonated spring.
Ibaraki Koga City
A super sento with a wide range of baths on a spacious site. You can enjoy as many as 12 different baths, combining indoor baths and open-air baths. The high-concentration artificial carbonated spring is especially expected to help promote blood circulation. With a cold plunge bath using binchotan charcoal and two types of sauna, the sauna facilities are also well equipped. There is also a ganbanyoku stone sauna and a dining area, making it a relaxing healing space rooted in the local community where you can spend the whole day at ease.
Sauna TypeDry Sauna
Stove TypeInfrared Heater
Capacity20people
A stadium-style sauna with tiered seating, where you can choose your preferred temperature zone and warm up slowly. The far-infrared effect heats you from deep within and efficiently promotes perspiration.
Sauna TypeSalt Sauna
Stove TypeInfrared Heater
Capacity10people
A low-temperature sauna where you rub salt into your skin, with expected benefits for removing waste products and improving skin condition. In the mild heat, you can enjoy detoxing at a leisurely pace.
Water QualityCharcoal Filtered Water
Capacity5people
A gentle cold plunge bath whose water has been purified by binchotan charcoal lining the walls. It makes the cool-down after sauna even more refreshing.
Closed Days: None
306-0056 Ibaraki Prefecture, Koga City, Sakama 185-1
Gender Access
Gender Separated
Curated by an expert who visits onsen and sauna facilities every day and has explored 300+ locations — only facilities confirmed to be truly exceptional are featured.
Learn more