One of Japan’s oldest springs, Arima is famous for its "Kinsen" (Gold Water), which is iron-rich and turns reddish-brown, and "Ginsen" (Silver Water), which is clear and contains radium. 5. Noboribetsu Onsen (Hokkaido)

With the highest discharge rate in Japan, Beppu is a geothermal wonderland. The variety of mineral compositions here is unmatched, ranging from mud baths to steam-enriched waters. 4. Arima Onsen (Hyogo)

The Ultimate Guide to Gensenfuro 13: Top-Tier Hot Springs for Pure Relaxation

Natural minerals like silica and sulfur deeply cleanse and hydrate.

Pure water stimulates blood flow and helps the body flush toxins more effectively than treated water. Tips for Visiting the Top 13

The inspiration for Spirited Away , this legendary spot features a main building that is a national treasure. Its waters have been healing travelers for over 1,000 years. 13. Kinosaki Onsen (Hyogo)

Always wash thoroughly before entering the tub to keep the source water pristine.