Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
High buoyancy
LowHigh
Mineralised water — eases movement and joints.
CO2BicarbonatesMagnésium
Chikatani Onsen—Nearby Valley Spring—takes its name from its accessible valley setting in Saitama Prefecture, positioning itself within comfortable reach of the greater Tokyo metropolitan area as one of the closest significant thermal spring experiences available to the tens of millions of residents of Japan's most densely populated urban region. The bicarbonate and carbonated waters deliver an effervescent, skin-stimulating mineral soak that brings the therapeutic and sensory richness of Japan's volcanic spring tradition to urban visitors who may lack the time or resources for journeys to Hokkaido's famous springs or the remote alpine springs of Nagano and Gunma. This spring's nearby valley name directly acknowledges its primary role as an accessible therapeutic escape for the urban population of the Kanto metropolitan zone.
Insider tip — Chikatani Onsen sits in the Ogano River valley at the foot of the Chichibu mountains in Saitama Prefecture, where naturally carbonated bicarbonate water bubbles up from Paleozoic limestone formations. The spring is one of several carbon dioxide-enriched sources in this little-visited border zone between Saitama and Gunma, prized by aficionados for their rare effervescent quality. The surrounding Chichibu-Tama-Kai National Park offers spectacular hiking through limestone karst and ancient cedar forest.