Kawafuru Onsen

Kawafuru Onsen in Gunma Prefecture flows with bicarbonate and carbonated thermal waters, combining the gentle alkaline chemistry of bicarbonate minerals with the effervescent, skin-tingling quality of dissolved carbon dioxide that gives carbonated springs their unique sensory character and their longstanding reputation in Japanese and European thermal tradition. Gunma Prefecture, home to some of Japan's most celebrated onsen destinations, provides an extraordinary geothermal context for this spring, where the volcanic substructure of the Joshinetsu plateau region produces remarkably diverse thermal water types including this unusual bicarbonate-carbonated combination. The effervescent warmth of Kawafuru Onsen's mineral water offers bathers a distinctively lively and physically stimulating immersion experience that stands apart from the quieter, more meditative character of purely simple or bicarbonate springs found elsewhere in Gunma's vast thermal landscape.