Traditional relaxation with a rich golden spring and a rare box sauna
Gifu Kaizu City
"Kaizu Onsen Sorafune no Yu" is a hot spring facility in Kaizu City, Gifu Prefecture that serves both day-trip and overnight guests. It boasts an overwhelming flow rate of 560 liters per minute from 1,400 meters underground, and its defining feature is its rich golden-brown source spring, which is strongly mineralized with iron and salt. In addition to a standard dry sauna, the outdoor area is equipped with a rare single-person box sauna, uncommon even within the prefecture. This box sauna heats the body from the neck down, putting less strain on the body while allowing you to work up a deep sweat at a relaxed pace. With a wide variety of baths, it is a high-caliber hot spring spot where you can experience the blessings of nature with all five senses.
TypeNatural Hot Spring
A sodium-calcium chloride hot spring. Its defining feature is a cloudy golden-brown bath, colored by iron oxidizing on contact with the air. It has a strong salty taste and a metallic scent, and the hot spring minerals have a powerful effect on the body. By taking advantage of the abundant flow rate of 560 liters per minute, you can luxuriate in free-flowing source water in many of the baths.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity10people
A standard high-temperature dry sauna installed in the indoor bath area. The steady heat wraps around your body and encourages a comfortable sweat. Using it after warming up in the rich hot spring bath can provide an even deeper sense of relaxation.
Sauna TypeSteam Sauna
Capacity1people
A single-person wooden box-style sauna in the outdoor area. You bathe with only your neck exposed, so your face does not get too hot and you can relax without feeling short of breath while warming up deeply to your core. It is a rare facility, with few examples of installation in the prefecture.
Water QualityTap Water
Capacity2people
A cold plunge bath that is essential for cooling down after the sauna. Its moderate chill lets you enjoy alternating hot and cold bathing with the sauna and the rich, high-temperature spring in a well-balanced way.
Closed Days: None
〒503-0628 Gifu Prefecture, Kaizu City, Kaizu Town, Fukue 560-1
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
Traditional relaxation with a rich golden spring and a rare box sauna
Gifu Kaizu City
"Kaizu Onsen Sorafune no Yu" is a hot spring facility in Kaizu City, Gifu Prefecture that serves both day-trip and overnight guests. It boasts an overwhelming flow rate of 560 liters per minute from 1,400 meters underground, and its defining feature is its rich golden-brown source spring, which is strongly mineralized with iron and salt. In addition to a standard dry sauna, the outdoor area is equipped with a rare single-person box sauna, uncommon even within the prefecture. This box sauna heats the body from the neck down, putting less strain on the body while allowing you to work up a deep sweat at a relaxed pace. With a wide variety of baths, it is a high-caliber hot spring spot where you can experience the blessings of nature with all five senses.
TypeNatural Hot Spring
A sodium-calcium chloride hot spring. Its defining feature is a cloudy golden-brown bath, colored by iron oxidizing on contact with the air. It has a strong salty taste and a metallic scent, and the hot spring minerals have a powerful effect on the body. By taking advantage of the abundant flow rate of 560 liters per minute, you can luxuriate in free-flowing source water in many of the baths.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity10people
A standard high-temperature dry sauna installed in the indoor bath area. The steady heat wraps around your body and encourages a comfortable sweat. Using it after warming up in the rich hot spring bath can provide an even deeper sense of relaxation.
Sauna TypeSteam Sauna
Capacity1people
A single-person wooden box-style sauna in the outdoor area. You bathe with only your neck exposed, so your face does not get too hot and you can relax without feeling short of breath while warming up deeply to your core. It is a rare facility, with few examples of installation in the prefecture.
Water QualityTap Water
Capacity2people
A cold plunge bath that is essential for cooling down after the sauna. Its moderate chill lets you enjoy alternating hot and cold bathing with the sauna and the rich, high-temperature spring in a well-balanced way.
Closed Days: None
〒503-0628 Gifu Prefecture, Kaizu City, Kaizu Town, Fukue 560-1
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