Koshigaya Onsen Saitama
- Location
- Koshigaya, Saitama Prefecture, Japan
- Water type
- sodium chloride
- Temperature
- 41 °C
- pH
- 7.3
Water profile
Relaxing — deep, immediate muscle release.
Loaded with major ions — the essential minerals (Ca, Mg).
Dense, salty water — you float without effort.
Koshigaya, a large suburban city in southeastern Saitama Prefecture, is home to the spectacular Koshigaya Lake Town, the largest shopping centre in Japan by floor area, whose lakeside commercial landscape draws millions of shoppers from across the Kanto region seeking retail and leisure amid an artificial lake and waterfront promenade. Koshigaya Onsen Saitama draws on chloride-rich thermal waters from the deep alluvial aquifers of the Musashino terrace, providing warming mineral baths in a suburban setting where Japan's deep sento bathing culture persists alongside contemporary retail and entertainment development. The Motoaraimon hot spring district, the Koshigaya Lake Town waterfront dining scene, and easy Tobu Isesaki Line access to Tokyo's historic Asakusa entertainment district make Koshigaya an accessible and convenient thermal destination within the greater Tokyo metropolitan area.