Enjoy superb natural hot springs and a Bihou cold plunge bath at the birthplace of auto heat waves
Tokyo Taito City
"Natural Hot Spring Yudonburi Sakaeyu" is a continuously evolving natural hot spring sento in Taito City, Tokyo. Every drop of water in the facility, from the faucets and showers to the baths, uses a mildly alkaline natural hot spring rich in metasilicic acid. Its signature sauna is known for introducing the industry’s first auto heat wave system, combining automatic löyly and fan-driven airflow, for intense heat and refreshing exhilaration. In addition, the "Bihou" cold plunge bath, with its fine bubbles enveloping the whole body, offers the perfect balance of the spring water’s smooth softness and chiller-based cooling. It is a must-visit sacred place for sauna enthusiasts, where downtown charm and state-of-the-art facilities come together.
TypeNatural Hot Spring
A beauty hot spring rich in metasilicic acid that leaves your skin smooth. It is characterized by its mild, gently alkaline water, and is used not only in all bathtubs in the large bath area, but also in the showers and faucets. You can fully enjoy the blessings of natural hot springs in a wide variety of baths, including an open-air bath and a large fountain bath.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity10people
The men’s sauna is equipped with a sauna stove from Helo, a sauna brand with more than 100 years of history in its native Finland. The women’s sauna is equipped with a METOS iki sauna stove.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity10people
A wood-burning trailer sauna introduced in 2024. It features the sound of burning firewood and gentle heat, and self-löyly is also available. Even in the middle of the city, you can enjoy an immersive experience like a genuine outdoor sauna.
Water QualityHot Spring Water
Capacity4people
A luxurious cold plunge bath using natural hot spring water, with a Bihou design that produces microscopic bubbles. The chiller-cooled spring water feels even colder thanks to the bubble effect, allowing you to cool down all at once while gently stimulating the skin. Its smooth feel, brought by the spring minerals, is also a major appeal.
Closed Days: Wednesday
〒111-0021 Tokyo, Taito City, Nihonzutsumi 1-4-5
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 superb natural hot springs and a Bihou cold plunge bath at the birthplace of auto heat waves
Tokyo Taito City
"Natural Hot Spring Yudonburi Sakaeyu" is a continuously evolving natural hot spring sento in Taito City, Tokyo. Every drop of water in the facility, from the faucets and showers to the baths, uses a mildly alkaline natural hot spring rich in metasilicic acid. Its signature sauna is known for introducing the industry’s first auto heat wave system, combining automatic löyly and fan-driven airflow, for intense heat and refreshing exhilaration. In addition, the "Bihou" cold plunge bath, with its fine bubbles enveloping the whole body, offers the perfect balance of the spring water’s smooth softness and chiller-based cooling. It is a must-visit sacred place for sauna enthusiasts, where downtown charm and state-of-the-art facilities come together.
TypeNatural Hot Spring
A beauty hot spring rich in metasilicic acid that leaves your skin smooth. It is characterized by its mild, gently alkaline water, and is used not only in all bathtubs in the large bath area, but also in the showers and faucets. You can fully enjoy the blessings of natural hot springs in a wide variety of baths, including an open-air bath and a large fountain bath.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity10people
The men’s sauna is equipped with a sauna stove from Helo, a sauna brand with more than 100 years of history in its native Finland. The women’s sauna is equipped with a METOS iki sauna stove.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity10people
A wood-burning trailer sauna introduced in 2024. It features the sound of burning firewood and gentle heat, and self-löyly is also available. Even in the middle of the city, you can enjoy an immersive experience like a genuine outdoor sauna.
Water QualityHot Spring Water
Capacity4people
A luxurious cold plunge bath using natural hot spring water, with a Bihou design that produces microscopic bubbles. The chiller-cooled spring water feels even colder thanks to the bubble effect, allowing you to cool down all at once while gently stimulating the skin. Its smooth feel, brought by the spring minerals, is also a major appeal.
Closed Days: Wednesday
〒111-0021 Tokyo, Taito City, Nihonzutsumi 1-4-5
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