Wataze Onsen is a peaceful hot spring destination in Hongu, Tanabe City, Wakayama Prefecture. It is one of the three hot spring resorts that make up the Kumano Hongu Hot Spring Area, together with Yunomine Onsen and Kawayu Onsen.
Surrounded by the mountains and forests of the Kii Peninsula, Wataze Onsen is located near Kumano Hongu Taisha, one of the three major shrines of Kumano. The area has long welcomed travelers and pilgrims exploring the sacred mountains and historic pilgrimage routes of Kumano.
Although Wataze Onsen developed more recently than some of the area’s historic hot springs, it offers a wide range of experiences suited to modern travelers. These include a huge open-air bath, private family baths, accommodation, camping, cottages, and outdoor activities.
The surrounding area is also rich in cultural and natural attractions. Visitors can combine a relaxing stay at the hot springs with sightseeing at Kumano Hongu Taisha, walking along the Kumano Kodo, exploring mountain villages, and enjoying the beautiful scenery of the Kii Peninsula.
Each season offers a different experience. Fresh green foliage appears in spring, rivers become popular places for summer activities, autumn brings colorful leaves, and winter creates an atmospheric landscape of rising steam, quiet forests, and star-filled skies.
In 1957, Wataze Onsen was designated as part of the Kumano Hongu Hot Spring Area, together with Yunomine Onsen and Kawayu Onsen, as a National Hot Spring Health Resort.
This designation recognizes hot spring areas in Japan that are considered particularly suitable for health, relaxation, and long-term stays because of their natural surroundings and bathing qualities.
Wataze Onsen also has a strong connection with the religious traditions of Kumano. Every October, a ceremony known as the Hot Spring Offering Festival is held, during which hot spring water is offered to Kumano Hongu Taisha.
The ceremony demonstrates the longstanding relationship between hot spring culture and the spiritual traditions of Kumano. For travelers following the Kumano pilgrimage routes, visiting a hot spring is not simply a way to relax after hiking; it is also connected with the region’s historic traditions of purification and renewal.
The spring water at Wataze Onsen is classified as a sodium bicarbonate-chloride spring. Springs rich in bicarbonate are often traditionally associated in Japan with a soft, smooth feeling on the skin.
For this reason, Wataze Onsen is sometimes described as a “beauty bath.” The water is clear and gentle, making it suitable for relaxing after a long day of sightseeing or hiking.
The hot spring has also traditionally been valued for its potential benefits for various ailments, including neuralgia, rheumatism, digestive conditions, diabetes, and certain skin conditions. Visitors seeking a longer stay for relaxation and therapeutic bathing have therefore been attracted to the area for many years.
Wataze is also known for its abundant supply of hot spring water, with facilities offering fresh spring water, including source-fed bathing experiences.
One of the greatest attractions of Wataze Onsen is the enormous Wataze Onsen open-air bath, regarded as one of the largest outdoor hot spring baths in western Japan.
The spacious bath is surrounded by the mountains and forests of the Kii Peninsula. Instead of being enclosed by buildings, bathers can enjoy the open sky, fresh mountain air, and peaceful natural surroundings.
During the daytime, the scenery changes with the weather and season. Visitors can relax while looking at the surrounding mountains and greenery, listening to the sounds of nature.
At night, the experience becomes even more atmospheric. On clear evenings, the dark skies around Kumano reveal countless stars. During winter, steam rising from the warm water creates an especially beautiful scene.
The large outdoor bath is supplied with abundant natural hot spring water. The clear, gentle water provides a relaxing bathing experience after a day spent exploring the Kumano Kodo or visiting the region’s shrines.
As you soak in the bath, you may hear the sound of a nearby stream and feel the cool mountain breeze around you. The experience creates a sense of becoming part of the surrounding landscape.
For international visitors, this can be a particularly memorable introduction to Japan’s traditional onsen culture, where bathing is valued not only for physical relaxation but also for appreciating nature and slowing down from everyday life.
Wataze Onsen also offers private open-air baths that can be enjoyed by families, couples, and small groups.
Private bathing allows guests to enjoy the hot spring without worrying about other bathers. This makes the experience especially convenient for families traveling with young children or visitors who are experiencing Japanese hot springs for the first time.
Several private baths have their own distinctive atmosphere. Surrounded by trees and the peaceful scenery of the mountains, guests can spend a leisurely period enjoying the hot spring in privacy.
For travelers who want a more intimate experience, a private open-air bath can be one of the highlights of a stay at Wataze Onsen.
The Wataze Onsen area offers several accommodation options, including Yamayuri, Sasayuri, and Himeyuri, each providing a slightly different atmosphere.
Yamayuri features traditional Japanese-style architecture and a calm atmosphere. Guests can enjoy comfortable rooms and a spacious restaurant with high ceilings while taking in the changing scenery of the seasons.
Sasayuri is known for its spacious lobby and quiet guest rooms. Its relaxed surroundings are designed to help visitors unwind after a day of sightseeing, hiking, or pilgrimage.
The hospitality of the accommodations reflects the traditional Japanese approach to welcoming guests, with an emphasis on comfort, seasonal scenery, and local food.
Meals in the Wataze Onsen area make use of seasonal ingredients from Kumano and the wider Kishu region.
Depending on the accommodation and season, visitors may have the opportunity to enjoy regional specialties such as Kumano beef, whale dishes, and mountain vegetables.
Breakfast can also include a distinctive local experience: rice porridge cooked with hot spring water. Its gentle flavor makes it an ideal meal before setting out for another day of exploring the Kumano region.
The large open-air bath and private baths at Wataze Onsen are available not only to overnight guests but also to day visitors.
This makes the area an excellent place to stop after walking part of the Kumano Kodo or visiting Kumano Hongu Taisha. After several hours on a mountain trail, soaking in warm mineral water surrounded by nature can be an especially rewarding experience.
Facilities in the area also include restaurants and shops where visitors can discover local products and regional foods.
A restaurant located near the outdoor bathing facilities serves noodles, rice bowls, and regional dishes from the Kumano area.
One local specialty to look for is mehari-zushi, a traditional rice dish wrapped in pickled mustard greens. It is one of the best-known foods of the Kumano region and has long been enjoyed as a convenient meal by local people and travelers.
Sanma-zushi, sushi made with Pacific saury, is another regional specialty associated with the Kishu area.
Enjoying local cuisine after a relaxing bath is a simple but memorable way to experience the food culture of southern Wakayama.
The Wataze Onsen area is also home to WATAZE OUTDOOR – Otonashi-no-Sato, an outdoor recreation facility located beside a river along the Kumano Kodo.
The facility combines camping, cottages, hot springs, and dining, allowing visitors to enjoy the natural environment of Kumano in a variety of ways.
Camping options include free campsites and automobile-accessible sites, while comfortable cottages are available for travelers who want to experience nature without giving up modern conveniences.
The cottages are equipped with facilities such as air conditioning, kitchens, and bedding, making them suitable even for travelers who are new to camping.
The Shimomura River flows directly in front of the outdoor facility, providing opportunities for families to enjoy the water during the summer.
In areas where the river is shallow and the current is relatively gentle, children can enjoy playing in the water under appropriate adult supervision.
The remote mountain environment also provides excellent conditions for stargazing. With little artificial light, the night sky can appear remarkably clear. On suitable nights, visitors may even be able to see the Milky Way stretching across the sky.
Combining camping, river activities, hot spring bathing, and stargazing offers a different way to experience the natural beauty of Kumano beyond traditional sightseeing.
Wataze Onsen is located approximately 10 minutes by car from Kumano Hongu Taisha, making it a convenient base for exploring the sacred heart of Kumano.
The area is also close to popular sections of the Kumano Kodo. Many hikers choose to stay in the area so they can relax in the hot springs after walking the ancient mountain trails.
Depending on the accommodation, transportation services may also be available to places such as Kumano Hongu Taisha, Hosshinmon-oji, and Fushiogami-oji. These services can make it easier for visitors to plan a one-way hike rather than having to return along the same route.
Wataze Onsen can easily be combined with visits to the other famous hot springs in the Kumano Hongu area.
Yunomine Onsen is renowned for its ancient history and the World Heritage-listed Tsuboyu, a small hot spring bath associated with the traditional purification rituals of Kumano pilgrims.
Kawayu Onsen offers a completely different experience. Here, hot spring water naturally rises through the riverbed, allowing visitors to dig into the gravel and create their own warm bathing area. In winter, the famous Senninburo large open-air bath is created along the river.
Visiting all three hot spring areas allows travelers to experience the distinctive character of the Kumano Hongu Hot Spring Area.
Wataze Onsen brings together the natural beauty of the Kii Peninsula, abundant hot spring water, comfortable accommodation, local cuisine, and a wide variety of outdoor experiences.
Its enormous open-air bath provides an unforgettable opportunity to soak in warm water while surrounded by mountains and forests. Private baths offer a more intimate experience, while camping and river activities provide a chance to enjoy the area’s nature in a more adventurous way.
For travelers exploring the Kumano Kodo and Kumano Hongu Taisha, Wataze Onsen is also an ideal place to slow down and recover after a day on the pilgrimage trails.
Whether you visit for a few hours or stay several nights, the combination of hot springs, sacred sites, mountain scenery, local food, and traditional hospitality makes Wataze Onsen a rewarding destination in southern Wakayama.
Take time to step away from the pace of everyday life, listen to the sounds of the mountains and rivers, and enjoy the peaceful rhythm of a Japanese hot spring retreat. Wataze Onsen offers a memorable way to experience the healing nature and enduring spiritual culture of Kumano.