One of the strongest alkaline springs in Tohoku and a cold plunge bath with free-flowing spring water
Iwate Kuji City
Shinyamane Onsen Beppin no Yu is a hot spring facility tucked away in the mountains of Kuji, Iwate Prefecture. Its greatest attraction is the beauty bath, which boasts one of the strongest alkaline waters in the Tohoku region at pH 10.7, leaving the skin smooth with a lotion-like texture. The sauna is a full-fledged dry sauna, allowing guests to refresh themselves while being enveloped in pleasant heat. For cooling down after the sauna, there is a cold plunge bath using precious spring water in a lavish free-flowing style. Its mellow water quality and natural coldness lead you to a blissful state of totonou.
TypeNatural Hot Spring
A simple cold mineral spring boasting one of the strongest alkaline levels in the Tohoku region at pH 10.7. Its distinctive smooth, viscous feel is its hallmark, and it is highly popular as a beauty bath that removes dead skin cells and leaves the skin silky smooth. Rich minerals penetrate the body, making it a renowned spring with excellent benefits for recovery from fatigue and overall health promotion.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity10people
A calm dry sauna with the warmth of wood. Pleasant heat fills the room and promotes deep, efficient sweating. The appeal lies in being able to work up a sweat in a quiet space while facing yourself. Heat radiating from the sauna stones envelops your whole body and helps reset the fatigue of daily life.
Water QualityHot Spring Water
Capacity3people
A cold plunge bath that lavishly uses strongly alkaline spring water with a pH of 10.7 in a free-flowing style. The natural coldness, unfiltered by a chiller, and the lotion-like, mildly viscous water quality are gentle on the skin. It delivers a crisp cool sensation, yet its soft touch feels pleasant, and alternating between hot and cold with the sauna brings an overwhelming sense of refreshment.
Closed Days: None
〒028-8521 Iwate Prefecture, Kuji City, Yamane-cho Shimotosowari 4-1-5-1
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
One of the strongest alkaline springs in Tohoku and a cold plunge bath with free-flowing spring water
Iwate Kuji City
Shinyamane Onsen Beppin no Yu is a hot spring facility tucked away in the mountains of Kuji, Iwate Prefecture. Its greatest attraction is the beauty bath, which boasts one of the strongest alkaline waters in the Tohoku region at pH 10.7, leaving the skin smooth with a lotion-like texture. The sauna is a full-fledged dry sauna, allowing guests to refresh themselves while being enveloped in pleasant heat. For cooling down after the sauna, there is a cold plunge bath using precious spring water in a lavish free-flowing style. Its mellow water quality and natural coldness lead you to a blissful state of totonou.
TypeNatural Hot Spring
A simple cold mineral spring boasting one of the strongest alkaline levels in the Tohoku region at pH 10.7. Its distinctive smooth, viscous feel is its hallmark, and it is highly popular as a beauty bath that removes dead skin cells and leaves the skin silky smooth. Rich minerals penetrate the body, making it a renowned spring with excellent benefits for recovery from fatigue and overall health promotion.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity10people
A calm dry sauna with the warmth of wood. Pleasant heat fills the room and promotes deep, efficient sweating. The appeal lies in being able to work up a sweat in a quiet space while facing yourself. Heat radiating from the sauna stones envelops your whole body and helps reset the fatigue of daily life.
Water QualityHot Spring Water
Capacity3people
A cold plunge bath that lavishly uses strongly alkaline spring water with a pH of 10.7 in a free-flowing style. The natural coldness, unfiltered by a chiller, and the lotion-like, mildly viscous water quality are gentle on the skin. It delivers a crisp cool sensation, yet its soft touch feels pleasant, and alternating between hot and cold with the sauna brings an overwhelming sense of refreshment.
Closed Days: None
〒028-8521 Iwate Prefecture, Kuji City, Yamane-cho Shimotosowari 4-1-5-1
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