A wellness resort where you can enjoy a Finland sauna and a hot spring cold water bath
Niigata Nagaoka City
"Aquarer Nagaoka" is a hot spring resort in Nagaoka City, Niigata Prefecture, with lodging and fitness facilities. Its biggest feature is the newly opened Finland sauna, added in February 2024, where men and women can enjoy authentic auto löyly together while wearing swimsuits. The sauna room is set at 90 degrees, and the regular bursts of steam create a powerful sweat. The adjoining cold water bath, filled with hot spring water, is kept at 18 degrees and gently tones the body with its natural feel on the skin. The separate baths for men and women also have a dry sauna and a cold water bath, making this a versatile facility where you can enjoy anything from a refreshing post-workout break to a full totonou experience.
TypeNatural Hot Spring
A natural hot spring rich in metasilicic acid. The slightly pale yellow, clear water feels silky on the skin and is expected to help with recovery from fatigue and promote wellness. With a variety of baths such as open-air baths and reclining baths, you can enjoy this famous spring to your heart’s content.
Sauna TypeDry Sauna
Capacity10people
A dry sauna installed in each of the men’s and women’s baths. With a pleasantly moderate heat of around 80 degrees, you can work up a good sweat at a relaxed pace. The clean, comfortable space gently soothes the fatigue of everyday life.
Sauna TypeDry Sauna
Stove Typeconvection
Capacity12people
A newly built sauna that opened in February 2024. Available for men and women together while wearing swimsuits. Auto löyly runs at 00 and 30 minutes, filling the room with a pleasant level of humidity and heat at all times. Surrounded by the scent of wood, you can enjoy an authentic Nordic-style sauna bath.
Water QualityTap Water
Capacity2people
The cold water bath in each of the men’s and women’s baths. The slightly higher temperature makes it safe and comfortable even for those who do not like very cold water. It gently cools the body after the sauna and leads you into a calm state of totonou.
Water Qualitytap
Capacity3people
A luxurious cold water bath next to the Finland sauna, using hot spring water. It features an exquisite temperature setting of around 18 degrees and smooth water quality from the hot spring minerals. While still in your swimsuit, you can cool down your overheated body in a refreshing way.
Closed Days: Monday
940-2147 Niigata Prefecture, Nagaoka City, Shinyo 2-chome 5-1
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
A wellness resort where you can enjoy a Finland sauna and a hot spring cold water bath
Niigata Nagaoka City
"Aquarer Nagaoka" is a hot spring resort in Nagaoka City, Niigata Prefecture, with lodging and fitness facilities. Its biggest feature is the newly opened Finland sauna, added in February 2024, where men and women can enjoy authentic auto löyly together while wearing swimsuits. The sauna room is set at 90 degrees, and the regular bursts of steam create a powerful sweat. The adjoining cold water bath, filled with hot spring water, is kept at 18 degrees and gently tones the body with its natural feel on the skin. The separate baths for men and women also have a dry sauna and a cold water bath, making this a versatile facility where you can enjoy anything from a refreshing post-workout break to a full totonou experience.
TypeNatural Hot Spring
A natural hot spring rich in metasilicic acid. The slightly pale yellow, clear water feels silky on the skin and is expected to help with recovery from fatigue and promote wellness. With a variety of baths such as open-air baths and reclining baths, you can enjoy this famous spring to your heart’s content.
Sauna TypeDry Sauna
Capacity10people
A dry sauna installed in each of the men’s and women’s baths. With a pleasantly moderate heat of around 80 degrees, you can work up a good sweat at a relaxed pace. The clean, comfortable space gently soothes the fatigue of everyday life.
Sauna TypeDry Sauna
Stove Typeconvection
Capacity12people
A newly built sauna that opened in February 2024. Available for men and women together while wearing swimsuits. Auto löyly runs at 00 and 30 minutes, filling the room with a pleasant level of humidity and heat at all times. Surrounded by the scent of wood, you can enjoy an authentic Nordic-style sauna bath.
Water QualityTap Water
Capacity2people
The cold water bath in each of the men’s and women’s baths. The slightly higher temperature makes it safe and comfortable even for those who do not like very cold water. It gently cools the body after the sauna and leads you into a calm state of totonou.
Water Qualitytap
Capacity3people
A luxurious cold water bath next to the Finland sauna, using hot spring water. It features an exquisite temperature setting of around 18 degrees and smooth water quality from the hot spring minerals. While still in your swimsuit, you can cool down your overheated body in a refreshing way.
Closed Days: Monday
940-2147 Niigata Prefecture, Nagaoka City, Shinyo 2-chome 5-1
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