1 facility matching "Onsen & Sauna with Drinking Spring Water" in Gunma. Compare amenities, setting and access to find the right spot for your trip. In Japan, the ancient onsen culture goes beyond just bathing—'insen' (drinking spring water) is a deeply rooted tradition of taking in the earth's blessings from within. In this feature, we have carefully selected day-use baths, hotels, and ryokan equipped with dedicated drinking fountains or corners. Experience the profound depth of Japanese hot spring culture as you savor completely different tastes depending on the spring quality, such as a subtle saltiness or the aroma of iron. Whether staying overnight or visiting for the day, enjoy a special experience that gently restores you from the inside out during the moments before or after your soak.