Enjoy Echigo-Yuzawa’s natural hot spring in a state-of-the-art bath building with self-löyly
Niigata Uonuma City
"Edogawa Ward Shiozawa Edogawasou" is a health and relaxation facility for Edogawa Ward residents in Minamiuonuma City, Niigata Prefecture. Its biggest highlight is the newly built bath building, which opened in October 2024 and is available for both overnight stays and day use. In the latest sauna room, you can enjoy self-löyly with monthly changing aromas, creating a premium experience surrounded by rich fragrance and heat. A refreshing cold plunge bath and deck chair rest in the open-air bathing space with views of the mountains make for a blissful moment. Along with the natural hot spring water of Echigo Yukiguni Onsen, you can deeply reset both body and mind.
TypeNatural Hot Spring
Sodium chloride spring. The soft water has a subtle salty taste and a smooth, skin-friendly feel. You can bathe in both the large public bath and the open-air bath while taking in the rich natural scenery of Minamiuonuma.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity12people
A clean, newly built sauna added in 2024. Self-löyly is available, and the monthly aroma fills the room with fragrance, bringing a deep sense of relaxation. Powerful heat envelops your whole body.
Water QualityTap Water
Capacity4people
A refreshing cold plunge bath. It quickly cools down your overheated body after sauna use and delivers a crisp, clear cooldown.
Closed Days: None
2063-29 Juuniki, Maiko, Minamiuonuma City, Niigata Prefecture 949-6423, Japan
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
Enjoy Echigo-Yuzawa’s natural hot spring in a state-of-the-art bath building with self-löyly
Niigata Uonuma City
"Edogawa Ward Shiozawa Edogawasou" is a health and relaxation facility for Edogawa Ward residents in Minamiuonuma City, Niigata Prefecture. Its biggest highlight is the newly built bath building, which opened in October 2024 and is available for both overnight stays and day use. In the latest sauna room, you can enjoy self-löyly with monthly changing aromas, creating a premium experience surrounded by rich fragrance and heat. A refreshing cold plunge bath and deck chair rest in the open-air bathing space with views of the mountains make for a blissful moment. Along with the natural hot spring water of Echigo Yukiguni Onsen, you can deeply reset both body and mind.
TypeNatural Hot Spring
Sodium chloride spring. The soft water has a subtle salty taste and a smooth, skin-friendly feel. You can bathe in both the large public bath and the open-air bath while taking in the rich natural scenery of Minamiuonuma.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity12people
A clean, newly built sauna added in 2024. Self-löyly is available, and the monthly aroma fills the room with fragrance, bringing a deep sense of relaxation. Powerful heat envelops your whole body.
Water QualityTap Water
Capacity4people
A refreshing cold plunge bath. It quickly cools down your overheated body after sauna use and delivers a crisp, clear cooldown.
Closed Days: None
2063-29 Juuniki, Maiko, Minamiuonuma City, Niigata Prefecture 949-6423, Japan
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