Enjoy an automatic löyly sauna and the source water of Iwaki Yumoto in a Showa-retro setting
Fukushima Iwaki City
Tokinoyu is a day-use hot spring facility opening in December 2025 in Iwaki City, Fukushima Prefecture. The building is themed around Showa nostalgia, creating a charmingly retro and relaxing atmosphere. The sauna is equipped with an automatic löyly feature, delivering periodic waves of pleasant heat for an authentic experience. After the sauna, the spacious cold plunge bath, together with a rest in the open-air bathing area, leads you into a deep state of totonou. The baths make generous use of the rich source water from Iwaki Yumoto Onsen, creating an ultimate healing space where newness and nostalgia coexist.
TypeNatural Hot Spring
Generously fed by the famed source water of Iwaki Yumoto Onsen. The sulfur-scented waters are expected to help leave your skin smooth and refreshed. Soak to your heart's content in a Showa-retro bath and savor this historic famous spring.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity10people
A cutting-edge dry sauna equipped with an automatic löyly feature. Water is regularly poured onto the sauna stones, and the resulting steam circulates through the room as pleasant waves of heat. Enjoy a modern sauna experience in a Showa-retro atmosphere.
Water QualityTap Water
Capacity5people
A spacious cold plunge bath that thoroughly cools the body after the sauna. The crisp, chilled water envelops your whole body, instantly resetting you after the heat of löyly. Clean and comfortable, it offers an excellent cool-down experience.
Closed Days: None
〒971-8187 Fukushima Prefecture, Iwaki City, Hayama 2-25-1
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
Enjoy an automatic löyly sauna and the source water of Iwaki Yumoto in a Showa-retro setting
Fukushima Iwaki City
Tokinoyu is a day-use hot spring facility opening in December 2025 in Iwaki City, Fukushima Prefecture. The building is themed around Showa nostalgia, creating a charmingly retro and relaxing atmosphere. The sauna is equipped with an automatic löyly feature, delivering periodic waves of pleasant heat for an authentic experience. After the sauna, the spacious cold plunge bath, together with a rest in the open-air bathing area, leads you into a deep state of totonou. The baths make generous use of the rich source water from Iwaki Yumoto Onsen, creating an ultimate healing space where newness and nostalgia coexist.
TypeNatural Hot Spring
Generously fed by the famed source water of Iwaki Yumoto Onsen. The sulfur-scented waters are expected to help leave your skin smooth and refreshed. Soak to your heart's content in a Showa-retro bath and savor this historic famous spring.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity10people
A cutting-edge dry sauna equipped with an automatic löyly feature. Water is regularly poured onto the sauna stones, and the resulting steam circulates through the room as pleasant waves of heat. Enjoy a modern sauna experience in a Showa-retro atmosphere.
Water QualityTap Water
Capacity5people
A spacious cold plunge bath that thoroughly cools the body after the sauna. The crisp, chilled water envelops your whole body, instantly resetting you after the heat of löyly. Clean and comfortable, it offers an excellent cool-down experience.
Closed Days: None
〒971-8187 Fukushima Prefecture, Iwaki City, Hayama 2-25-1
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