Find your totonou with one of the largest saunas in the prefecture and a famous hot spring bubbling up from 1,500 m underground
Yamagata Tsuruoka City
"Shonai Obako no Sato Komagi Natural Hot Spring Komagi no Yu" is a comprehensive bathing facility in Tsuruoka City, Yamagata Prefecture. Its large sauna, one of the biggest in the prefecture, can accommodate more than 30 people at once, letting guests work up a pleasant sweat in a relaxed space. The sodium-calcium sulfate spring that flows from 1,500 m underground is colorless, clear, and smooth to the touch. With a three-tier stone outdoor bath and the rare Hakkōseki no Yu, among other tubs, guests can fully enjoy high-quality natural hot spring water in a variety of baths. The cold plunge bath after the sauna is deep enough to immerse you up to the shoulders, and cooling down in the open-air bathing space is especially refreshing. The facility also includes a direct-from-farm market and a restaurant, allowing visitors to enjoy the charms of Shonai all day long.
TypeNatural Hot Spring
A sodium-calcium sulfate spring that flows from 1,500 m underground. The colorless, clear water is gentle and easy on the skin, soothing everyday fatigue. The three-tier stone outdoor bath has a refined atmosphere, letting you fully enjoy this famous hot spring while feeling the air of each season.
Sauna TypeDry Sauna
Stove TypeInfrared Heater
Capacity30people
A large sauna boasting one of the biggest spaces in Yamagata Prefecture. The spacious room, which can hold more than 30 people, circulates gentle heat from a far-infrared heater, warming your body deeply and steadily. Guests can enjoy a leisurely sweat while watching TV in an open, comfortable setting.
Water QualityTap Water
Capacity4people
A cold plunge bath installed right next to the sauna. It is deep enough to immerse your shoulders, allowing you to efficiently cool down your entire body after the sauna. Its crisp coldness feels great, and the refreshing effect is excellent. Access to the outdoor area is also easy, leading smoothly into open-air bathing.
Closed Days: None
〒997-0824 88-1 Hieda Komagihara, Tsuruoka City, Yamagata Prefecture
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
Find your totonou with one of the largest saunas in the prefecture and a famous hot spring bubbling up from 1,500 m underground
Yamagata Tsuruoka City
"Shonai Obako no Sato Komagi Natural Hot Spring Komagi no Yu" is a comprehensive bathing facility in Tsuruoka City, Yamagata Prefecture. Its large sauna, one of the biggest in the prefecture, can accommodate more than 30 people at once, letting guests work up a pleasant sweat in a relaxed space. The sodium-calcium sulfate spring that flows from 1,500 m underground is colorless, clear, and smooth to the touch. With a three-tier stone outdoor bath and the rare Hakkōseki no Yu, among other tubs, guests can fully enjoy high-quality natural hot spring water in a variety of baths. The cold plunge bath after the sauna is deep enough to immerse you up to the shoulders, and cooling down in the open-air bathing space is especially refreshing. The facility also includes a direct-from-farm market and a restaurant, allowing visitors to enjoy the charms of Shonai all day long.
TypeNatural Hot Spring
A sodium-calcium sulfate spring that flows from 1,500 m underground. The colorless, clear water is gentle and easy on the skin, soothing everyday fatigue. The three-tier stone outdoor bath has a refined atmosphere, letting you fully enjoy this famous hot spring while feeling the air of each season.
Sauna TypeDry Sauna
Stove TypeInfrared Heater
Capacity30people
A large sauna boasting one of the biggest spaces in Yamagata Prefecture. The spacious room, which can hold more than 30 people, circulates gentle heat from a far-infrared heater, warming your body deeply and steadily. Guests can enjoy a leisurely sweat while watching TV in an open, comfortable setting.
Water QualityTap Water
Capacity4people
A cold plunge bath installed right next to the sauna. It is deep enough to immerse your shoulders, allowing you to efficiently cool down your entire body after the sauna. Its crisp coldness feels great, and the refreshing effect is excellent. Access to the outdoor area is also easy, leading smoothly into open-air bathing.
Closed Days: None
〒997-0824 88-1 Hieda Komagihara, Tsuruoka City, Yamagata Prefecture
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