A blissful resort with spectacular views from a river terrace overlooking the Shinano River, and a super-rich saline spring
Niigata Nagaoka City
"Echigo Kawaguchi Onsen Resort" is located on a plateau along a river terrace in Nagaoka, Niigata Prefecture, and boasts an overwhelming panoramic view overlooking the confluence of the Shinano and Uono Rivers. Its biggest highlight is its chloridemate, highly saline hot spring, renowned for having one of the highest mineral concentrations in Japan. The rich yellow-green water is said to be highly effective for skin beautification, and you can directly feel its powerful benefits in the open-air bath fed by free-flowing source water. The sauna is a dry sauna with strong far-infrared effects. After sauna use, the cold plunge bath, supplied by continuously flowing tap water and kept at 14 degrees, is ideal for cooling down. Outdoor air bathing while taking in the spectacular scenery offers an exceptional sense of openness, leading both body and mind into deep relaxation.
TypeNatural Hot Spring
An iodine-sodium-chloride highly saline hot spring. This ultra-rich source water is highly hypertonic and boasts one of the highest salt concentrations in Japan. The clear yellow-green water is also called the hot spring of heat, and it offers excellent warming and skin-beautifying effects. You can enjoy it luxuriously in the scenic open-air observation bath.
Sauna TypeDry Sauna
Stove TypeInfrared Heater
Capacity12people
A dry sauna that gently warms you from the core of your body with far-infrared effects. With a pleasantly moderate heat, it is also ideal for alternating with a super-rich hot spring. In a clean and comfortable interior, you can enjoy a slow, steady sweat.
Water QualityTap Water
Capacity2people
A cold plunge bath supplied by continuously flowing tap water. Its firm chill helps tighten a body that has been heated up by the sauna or the rich hot spring. The smooth water quality makes cooling down comfortable as well.
Closed Days: Tuesday
2515-3 Kawaguchi Nakayama, Nagaoka City, Niigata Prefecture 949-7503
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
A blissful resort with spectacular views from a river terrace overlooking the Shinano River, and a super-rich saline spring
Niigata Nagaoka City
"Echigo Kawaguchi Onsen Resort" is located on a plateau along a river terrace in Nagaoka, Niigata Prefecture, and boasts an overwhelming panoramic view overlooking the confluence of the Shinano and Uono Rivers. Its biggest highlight is its chloridemate, highly saline hot spring, renowned for having one of the highest mineral concentrations in Japan. The rich yellow-green water is said to be highly effective for skin beautification, and you can directly feel its powerful benefits in the open-air bath fed by free-flowing source water. The sauna is a dry sauna with strong far-infrared effects. After sauna use, the cold plunge bath, supplied by continuously flowing tap water and kept at 14 degrees, is ideal for cooling down. Outdoor air bathing while taking in the spectacular scenery offers an exceptional sense of openness, leading both body and mind into deep relaxation.
TypeNatural Hot Spring
An iodine-sodium-chloride highly saline hot spring. This ultra-rich source water is highly hypertonic and boasts one of the highest salt concentrations in Japan. The clear yellow-green water is also called the hot spring of heat, and it offers excellent warming and skin-beautifying effects. You can enjoy it luxuriously in the scenic open-air observation bath.
Sauna TypeDry Sauna
Stove TypeInfrared Heater
Capacity12people
A dry sauna that gently warms you from the core of your body with far-infrared effects. With a pleasantly moderate heat, it is also ideal for alternating with a super-rich hot spring. In a clean and comfortable interior, you can enjoy a slow, steady sweat.
Water QualityTap Water
Capacity2people
A cold plunge bath supplied by continuously flowing tap water. Its firm chill helps tighten a body that has been heated up by the sauna or the rich hot spring. The smooth water quality makes cooling down comfortable as well.
Closed Days: Tuesday
2515-3 Kawaguchi Nakayama, Nagaoka City, Niigata Prefecture 949-7503
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