An Untouched Forest and Crystal-Clear Stream
A Landscape Shaped by Water and Time
The greatest attraction of Hyakkenzan Gorge is the amount of untouched natural environment that remains. As you walk through the gorge, the sound of clear flowing water echoes between the rocks, while moss-covered boulders and dense forests create an almost dreamlike atmosphere.
The area receives as much as 4,000 mm of rainfall annually. Over countless years, the powerful flow of the river has gradually eroded the bedrock, creating numerous natural potholes.
These potholes are holes formed when stones carried by a river become trapped in depressions in the bedrock and are rotated by the force of the water. As the stones repeatedly grind against the rock, the holes gradually become larger and deeper. They are a remarkable example of nature’s ability to create its own works of art.
The gorge is also characterized by geological formations created in relatively soft sandstone. The humid environment supports a remarkable diversity of plant life, including species associated with both warmer and cooler climates. This makes Hyakkenzan Gorge valuable not only as a scenic destination but also as an area of considerable scientific interest.
In spring, brilliant green foliage covers the mountainsides. In autumn, colorful leaves are reflected in the clear stream, creating scenery that resembles a traditional Japanese landscape painting.
A New Scenic View Around Every Bend
Walking along the stream, visitors can discover a succession of waterfalls, pools, unusual rocks, and other natural formations. Suspension bridges and rock tunnels have also been incorporated into the trail, adding a sense of adventure to the experience.
The main hiking route is relatively accessible, with no particularly extreme changes in elevation. This makes it possible for beginners to enjoy the scenery at a relaxed pace.
Stopping occasionally to admire the landscape, listening to the sound of flowing water, and breathing in the fresh forest air can provide a welcome escape from the routines of everyday life.
Waterfalls and Scenic Highlights
Umetaro Pool
One of the first scenic features visitors encounter after entering the gorge is Umetaro Pool. Nearby stands a Japanese bay tree said to be around 500 years old.
According to local legend, a woodsman named Umetaro once dropped a tree root here, and the root eventually grew into the large tree that can be seen today. Sunlight filtering through the forest onto the quiet pool creates a peaceful introduction to the gorge.
Kayano Falls
After passing through a rock tunnel and climbing a series of steps, visitors reach Kayano Falls. The waterfall takes its name from a large Japanese kaya nutmeg tree that once grew above the falls and was believed to be more than 300 years old.
Although relatively small, the waterfall has an elegant appearance. The combination of falling water, rugged rock surfaces, and moss makes it a popular location for photography.
Futaoigama
One of the most distinctive scenic areas in Hyakkenzan Gorge is Futaoigama. A large rock formation extends over the waterfall pool like an enormous lid, which is believed to have inspired the name.
A waterfall approximately 8 meters high pours energetically into the pool below. The powerful combination of water and rock allows visitors to experience the impressive force of nature at close range.
Fuji no Nakajima
The gorge is home to many naturally growing wisteria plants, and Fuji no Nakajima is one of the best-known examples. In spring, the area is covered with beautiful purple wisteria blossoms, creating an enchanting landscape.
In summer, the wisteria produces hanging seed pods, giving the plant a completely different appearance. A local tradition also holds that wisteria vines that extend from left to right are considered a sign of good fortune.
Amagoi Falls
Beyond a rock tunnel and suspension bridge is Amagoi Falls, a waterfall approximately 10 meters high.
The name “Amagoi” means “prayer for rain.” According to local tradition, when the area suffered from drought in the past, people performed kagura, a traditional sacred Shinto dance, in front of the waterfall while praying for rain.
The waterfall flowing into its broad pool, surrounded by deep forest, creates a mysterious and tranquil atmosphere.
Meoto Falls
Meoto Falls consists of two streams flowing closely together. The name means “Husband and Wife Falls,” reflecting the appearance of the two streams flowing side by side.
The gentle scenery and peaceful sound of the water make this a relaxing place to stop and enjoy the natural surroundings.
Jizo Falls
Jizo Falls takes its name from its rounded shape, which resembles the head of a Jizo, a beloved Buddhist figure traditionally associated with the protection of travelers and children.
The waterfall is located on a tributary slightly away from the main stream. Its relatively modest flow creates a particularly quiet and peaceful atmosphere.
Inuochi Falls
One of the most impressive sights in Hyakkenzan Gorge is Inuochi Falls, which drops approximately 30 meters.
The elegant waterfall is one of the largest and most spectacular falls in the gorge. According to legend, its name comes from a hunting dog that supposedly fell into the waterfall together with a wild boar during a hunt long ago.
With both power and beauty, Inuochi Falls is a memorable highlight for hikers and nature lovers exploring the gorge.
Trekking for Beginners and Experienced Hikers
Hyakkenzan Gorge has trails suitable for different levels of fitness, including a standard course for general visitors and a more demanding route for experienced hikers.
The standard course takes approximately two hours and allows visitors to see many of the gorge’s principal waterfalls and scenic attractions. Suspension bridges and rock tunnels along the route add an adventurous element to the walk.
Although the elevation changes are relatively moderate, some sections of the trail can be slippery. Trekking shoes and comfortable outdoor clothing are therefore recommended.
Walking through the gorge is a wonderful way to experience nature at close range. The sound of the stream, birdsong, fresh forest scents, and cool mountain air combine to create a deeply refreshing experience.
Camping and Outdoor Adventures
Hyakkenzan Gorge Camp Village
Near the entrance to the gorge is Hyakkenzan Gorge Camp Village, a popular base for outdoor activities. The spacious grounds include tent sites and bungalows, making it suitable for families and groups.
Some of the bungalows are equipped with air conditioning and air purifiers, providing a comfortable option even for visitors who are new to camping.
Because the gorge trails are within walking distance, the campground is particularly convenient for travelers who want to spend more time surrounded by the area’s forests and streams.
Canoeing and River Activities
Canoeing and other river activities are also popular in the surrounding area. At Aikawa Canoe Port, visitors can enjoy canoeing on relatively calm sections of the river, making it suitable for beginners.
During summer, the rivers attract visitors looking to enjoy activities such as ayu fishing and playing in the river. These experiences offer an opportunity to enjoy Wakayama’s natural environment in an active and memorable way.
Attractions Around Hyakkenzan Gorge
Akagi Keisuikyo
Akagi Keisuikyo, located along a mountain stream, offers fishing experiences for ayu and rainbow trout. Visitors can have their catch grilled with salt and enjoy it fresh on site.
During summer, nagashi somen, a traditional Japanese style of eating noodles as they flow through a bamboo water channel, is also popular. It is a fun and refreshing experience, particularly on warm summer days.
Tomisato Onsen “Otome no Yu”
After hiking or trekking, visitors can relax at Tomisato Onsen Center “Otome no Yu.” The hot spring water rises from deep underground and contains a relatively high level of sodium ions, providing a warm and soothing bathing experience.
Relaxing in a traditional Japanese hot spring after exploring the mountain trails is an excellent way to end an active day in the countryside.
Roadside Station Furusato Center Oto
Roadside Station Furusato Center Oto is a popular stop for discovering local products from the Oto area. The shop offers fresh agricultural produce, locally made processed foods, and other regional specialties.
It is a convenient place to stop after exploring the gorge and to find souvenirs that reflect the flavors and character of the surrounding mountain communities.
Experience the Wilderness of Hyakkenzan Gorge
A Hidden Gem of Wakayama
Hyakkenzan Gorge is one of Wakayama’s remarkable hidden natural destinations, where waterfalls, clear mountain streams, enormous rocks, and ancient forests come together to create a spectacular landscape.
The scenery changes with every step, offering something new around every bend. For visitors who enjoy hiking, photography, camping, and outdoor adventures, the gorge provides an opportunity to experience a less-developed and more peaceful side of Japan.
From the fresh greenery of spring and the cool streams of summer to the brilliant colors of autumn and the quiet beauty of winter, Hyakkenzan Gorge offers a different experience in every season.
Take your time, listen to the sound of the water, breathe in the scent of the forest, and discover the waterfalls and unusual rock formations hidden along the trail. Hyakkenzan Gorge is an ideal destination for experiencing the power, beauty, and tranquility of Wakayama’s great outdoors.