Kumano Hongu Onsen Village

As the name suggests, Kawayu (river hot water) Onsen derives from the hot spring water that flows out from the river. If you dig the dry riverbed of Oto River, the tributary of Kumano River that flows in front of Kawayu Onsen, a headspring of over 70 degrees Celsius will gush out. You can make your own rustic open-air bath by digging the ground to make a bathtub. If the water is too hot, simply draw some water from the river. In the summer, you can warm your chilled body after playing in the river, and in the winter, enjoy bathing in the Sennin-buro River Bath, a large open-air bath only available during the winter.

Wataze Onsen lies between Kawayu and Yunomine along the Yomura River at the foot of Kumano's mountains. There are bungalows and campgrounds in the area where you can enjoy outdoor activities such as fishing and playing in the river. The hot spring is also famous for its beautification properties that make the skin smooth. There are various baths, including one of Western Japan's largest open-air baths with water coming directly from the hot spring available for day trips as well as relaxing private open-air baths for family use. Another popular facility is a kurhaus with various bathtubs and training rooms for promoting health.