Ōkawa Onsen

Ōkawa Onsen is a hot spring in Japan whose bicarbonate and naturally carbonated mineral waters combine the alkaline, skin-cleansing character of bicarbonate springs with the refreshing effervescent quality of natural carbon dioxide to create a particularly pleasant and lively bathing experience. Naturally carbonated hot springs are among the rarer and more prized spring types in Japan, where the combination of volcanic geothermal heat with naturally occurring carbon dioxide produces the sparkling mineral water effect that refreshes the skin and creates the characteristic tingling sensation that distinguishes carbonated springs from their still-water counterparts. The joint presence of bicarbonate alkalinity and natural carbonation in the Okawa spring makes this a doubly appealing destination for visitors who appreciate both the sensory pleasures of effervescent bathing and the relaxing well-being of alkaline mineral water immersion within a long thermal tradition.