Kozagawa Town is a beautiful mountain town in Higashimuro District, southern Wakayama Prefecture. Located deep within the Kii Peninsula, the town is surrounded by extensive forests, rugged mountains, and clear rivers.
The Kozagawa River, which flows through the center of the town, is the heart of the local landscape. Its remarkably clear water has earned it the nickname “Crystal River,” and the river attracts visitors who come to enjoy the peaceful scenery and outdoor activities.
The town offers a wide range of experiences, including canoeing, stand-up paddleboarding, river play, and ayu fishing. It is also home to dramatic geological formations, enormous rocks designated as National Natural Monuments, mysterious waterfalls, and secluded valleys that provide a strong sense of wilderness.
Kozagawa’s natural environment also supports a rich food culture. Local specialties include wild ayu sweetfish, amago trout, wild eel, game meat, and yuzu citrus. Visitors can experience not only the spectacular scenery but also the traditional lifestyle, local cuisine, and warm hospitality of a community closely connected with nature.
Kozagawa Town is located inland near the southern end of the Kii Peninsula. Approximately 90 percent of the town is covered by forest, while the Kozagawa River winds through the mountains.
Flat land is limited, and communities have historically developed along the river. The river has long provided water, transportation routes, food, and other resources essential to local life.
The Kozagawa River rises in the mountains around Mount Otō and flows southeastward before reaching the Pacific coast. Its exceptionally clear water allows visitors to see the stones on the riverbed even from the riverbank.
The combination of crystal-clear water, forest-covered mountains, rocky riverbeds, and peaceful villages creates one of the most distinctive landscapes in southern Wakayama.
In the northern part of Kozagawa stands Mount Otō, which reaches an elevation of approximately 1,122 meters. The mountain forms part of the headwaters of the Kozagawa River and plays an important role in supporting the area’s abundant water resources.
Other mountains, including Mount Takao, Mount Ashigo, and Mount Omori, form a rugged landscape characteristic of the Kii Peninsula.
These mountains provide opportunities for hiking, nature observation, and enjoying seasonal scenery. Fresh greenery in spring and early summer, deep green forests in summer, and colorful foliage in autumn offer different experiences throughout the year.
The Kozagawa River has influenced the history and economy of the surrounding communities for centuries. Forestry was particularly important, and Kozagawa timber became known as high-quality wood.
Timber harvested in the mountains was transported downstream using the river, making the waterway an important part of the region’s traditional economy.
During the Edo period, charcoal production was also an important industry. Local people used ubamegashi oak, a dense hardwood, to produce high-quality charcoal, including the famous Binchotan charcoal.
The charcoal was highly valued in major urban centers such as Edo, present-day Tokyo, and the Kansai region. The Sato family of the Takaike area is said to have controlled much of the charcoal distribution at the time and accumulated considerable wealth.
Today, the Kozagawa Town Hall stands on the former site of the Sato family’s residence, providing a reminder of the area’s economic history.
One of Kozagawa’s most famous landmarks is Ichimai-iwa, a gigantic monolithic rock designated as a National Natural Monument.
The enormous rock wall is approximately 100 meters high and 500 meters wide, making it one of the largest formations of its kind in Japan. Rising dramatically beside the river, the rock creates an impressive landscape that has become one of the town’s most popular tourist attractions.
The scenery changes beautifully with the seasons. Cherry blossoms add color in spring, fresh greenery surrounds the rock in summer, and autumn foliage creates a vivid landscape later in the year.
In front of the rock is Michi-no-Eki Ichimai-iwa Monolith, a roadside station where visitors can take a break and enjoy food while sightseeing.
Mushikui-iwa, or “Insect-Eaten Rock,” is another remarkable geological landmark in the Ikenoyama area of Kozagawa.
The surface of the enormous rock is covered with countless holes, giving it the strange appearance of having been eaten away by insects. These cavities were formed naturally over a very long period through weathering and erosion caused by wind and rain.
The site is also recognized as a geosite within the Nanki-Kumano Geopark, making it an excellent place to appreciate the geological history of the Kii Peninsula.
Takinohai, located along the Ogawa River, a tributary of the Kozagawa, is famous for its unusual rocky riverbed filled with potholes.
A pothole is a naturally formed circular depression created when stones are repeatedly rotated by flowing water, gradually grinding away the bedrock. At Takinohai, numerous potholes of different sizes can be seen across the riverbed.
The unusual formations create a fascinating landscape that is particularly popular with photographers. During summer, the area also attracts anglers fishing for ayu, while the river provides opportunities to enjoy the cool water and refreshing natural surroundings.
Shōjohō is a striking rocky peak in the Tsukinose area. Its reflection on the calm surface of the river creates a particularly beautiful scene.
The surrounding area includes a parking area and accessible riverbank, making it a popular summer destination for families. Visitors can enjoy playing in the river and having a barbecue while surrounded by Kozagawa’s mountains and clear water.
Maboroshi Falls, located upstream along the Tochi River, is one of the most impressive waterfalls in Kozagawa in terms of height.
The waterfall has traditionally been described as being only “one bale of rice” lower than Nachi Falls, one of Japan’s most famous waterfalls. This led to the nickname “the phantom tallest waterfall in Japan.”
Access to the waterfall is currently closed because of landslide damage, but its mysterious reputation and spectacular scale continue to capture the imagination of people interested in Kozagawa’s hidden natural landscapes.
Nakatsutani Falls, located in the Ogawa River area, is an impressive waterfall consisting of seven cascading sections.
It is one of the lesser-known destinations in Kozagawa and has a distinctly secluded atmosphere. The abundant mountain water flows quietly through the forest, creating a peaceful scene far from the busy tourist routes.
Uoe-no-taki Falls and Hario Falls are located deep in the Matsune area. Their clear blue pools and mysterious rock surroundings create an almost otherworldly atmosphere.
The combination of transparent water, moss-covered rocks, and dense forest makes these waterfalls especially appealing to travelers looking for secluded natural scenery.
Kosenji Temple in the Miogawa area is home to a magnificent ginkgo tree estimated to be approximately 400 years old.
The giant tree stands about 30 meters tall and has a trunk circumference of approximately 6 meters. In autumn, its leaves turn brilliant golden yellow, covering the temple grounds with a spectacular carpet of color.
It is regarded as one of the most impressive old ginkgo trees in Wakayama Prefecture.
The Myōjin Submersible Bridge is a distinctive type of bridge designed to disappear beneath the water during periods of high water.
Such bridges are relatively rare in Japan. The bridge retains a nostalgic rural atmosphere and has become a popular photography location for visitors looking to capture the traditional scenery of the Kozagawa River.
Kōike Gomeisha is a wooden Western-style building constructed during the Taisho period in the early 20th century.
The building serves as a center for preserving and passing down the tradition of Kozaryu Shishimai, a local lion dance tradition.
The entrance columns feature decorative carvings inspired by Greek architecture, creating a distinctive fusion of Japanese and Western architectural styles.
One of the most important traditional festivals along the Kozagawa River is the Kōchi Festival.
Five local districts—Koza, Furuta, Takaike, Utsugi, and Tsukinose—take part in the festival, with each community preserving its own traditions and rituals.
The festival is particularly distinctive because ceremonies are centered around a small island in the river that serves as the sacred object of worship. The combination of religious ceremonies, the river landscape, and local traditions creates a unique cultural experience.
At Maruyama Shrine in the Nishikawa area, an annual festival is held as part of a tradition said to have continued for more than 1,400 years.
Traditional performances such as lion dances are offered as part of the ceremonies, allowing visitors to experience a living cultural tradition passed down through generations.
The Kozagawa River is known as one of the best places in Japan for ayu sweetfish.
Large numbers of naturally migrating ayu enter the river, and some grow to an impressive size. The area’s reputation attracts anglers from across the Kansai and Chukyo regions.
Other river delicacies include amago trout, char, wild eel, freshwater shrimp, and Japanese mitten crabs. These ingredients reflect the exceptional quality of the local freshwater environment.
Kozagawa is also known for its high-quality yuzu citrus.
The temperature differences between day and night in the mountainous region create favorable conditions for growing fragrant yuzu. The fruit is used to make a variety of products, including yuzu vinegar, ponzu citrus sauce, jam, juice, and yuzu tea.
Kozagawa Yuzu Hirai no Sato in the Hirai area is particularly well known and has earned a strong reputation for its yuzu products.
Game cuisine is another specialty of Kozagawa. Restaurants in the area serve dishes made with wild deer, wild boar, and pheasant.
Game animals raised naturally in the surrounding mountains are valued for their rich flavor. In recent years, game cuisine has become an increasingly popular way for visitors to experience the relationship between the local food culture and the surrounding natural environment.
Beekeeping using Japanese honeybees has a long history in the Kozagawa region.
Traditional wooden hive boxes known as gōra are still used by some local beekeepers. Honey collected from Japanese honeybees has a rich and distinctive flavor and is regarded as a rare local specialty.
Kozagawa Town is home to several quiet hot spring areas, including Tsukinose Onsen, Yunohana Onsen, and Yugo Onsen.
Surrounded by mountains and forests, these hot springs provide a peaceful setting in which to relax after hiking, sightseeing, or enjoying outdoor activities along the river.
Visitors can also stay at accommodations such as Goenza OYADO, which overlooks Takinohai. Guests can enjoy activities such as barbecues, playing in the river, and ayu fishing experiences, making it possible to experience Kozagawa’s natural environment more fully.
Kozagawa Town does not have a railway station within the town itself. The nearest railway station is JR Koza Station on the Kisei Main Line.
From Koza Station, the Kozagawa Furusato Community Bus provides transportation to various parts of the town.
By car, visitors can reach the area via National Route 371 and Wakayama Prefectural Route 38, the Susami-Koza Line.
Several roadside stations also make convenient stops during a driving trip, including Michi-no-Eki Ichimai-iwa, Michi-no-Eki Mushikui-iwa, and Michi-no-Eki Takinohai Taro.
Kozagawa Town is a place where spectacular natural landscapes and traditional rural life exist side by side.
Massive rock formations, clear rivers, mysterious waterfalls, mountain forests, hot springs, traditional festivals, historic buildings, and distinctive local foods all come together to create a destination with remarkable variety.
For travelers looking to escape the noise of everyday life and reconnect with nature, Kozagawa offers an ideal setting. The clear Kozagawa River invites visitors to slow down, while the surrounding mountains and forests reveal new scenery at every turn.
Whether you come for outdoor adventures, scenic photography, traditional culture, local cuisine, or simply the chance to enjoy a quiet mountain retreat, Kozagawa is a destination where the beauty of the Kii Peninsula can be experienced at its most intimate and authentic.