Jingashita Valley is a natural valley located in Hodogaya Ward, Yokohama City, Kanagawa Prefecture. It is widely known as Yokohama’s only natural valley officially described as a gorge, offering visitors a surprisingly peaceful landscape within one of Japan’s largest cities.
The valley extends along the Ichizawa River, a tributary of the Katabira River. Its woodland, flowing water, and shaded walking paths create an environment quite different from the surrounding residential neighborhoods and urban roads.
Although Yokohama is well known for its port, shopping districts, and modern waterfront developments, Jingashita Valley reveals another side of the city: a natural environment where visitors can enjoy woodland scenery and the sound of running water.
The area is especially valuable as a remaining green space within the urban landscape and is appreciated by local residents as a place for walking and experiencing nature.
The name Jingashita is traditionally associated with Wada Yoshimori, a warrior of the Kamakura period (1185–1333). According to local tradition, he once established a hunting camp in this area.
The Japanese word jinya refers to a military camp or headquarters, and the name Jingashita is believed to have developed from the area’s association with the camp established by Wada Yoshimori.
This local legend gives the valley a historical dimension in addition to its natural appeal. It also reflects the connections between the surrounding region and the military history of medieval Japan.
The area around the valley underwent changes as Yokohama’s urban infrastructure developed. In connection with construction of the Yokohama Ring Road No. 2, the surrounding land was improved as an urban landscape park designed to preserve the natural environment.
Jingashita Valley Park opened to the public in April 2004 (Heisei 16). The park extends around the residential neighborhoods and the Nishiya Water Purification Plant operated by the Yokohama Waterworks Bureau.
The establishment of the park helped protect this unusual natural landscape and provide residents with access to a valuable green space. Today, it remains an important example of how natural environments can be preserved within a densely populated urban area.
One of the most distinctive features of Jingashita Valley is its stream, which flows through the wooded valley. Water from springs scattered throughout the forest has historically contributed to the flow, creating a natural waterside environment in the middle of Yokohama.
However, the water system has changed over time as residential development and other infrastructure have altered the surrounding landscape. The exact source of the stream is not clearly defined.
According to the area’s environmental background, the water flowing through the valley comes from several sources, including rainwater from privately owned land and nearby residential districts, filtered water from the Nishiya Water Purification Plant, and water entering from the flood-control reservoir at Hodogaya High School.
In the past, groundwater springs were the principal source of water. However, development in the surrounding area has changed the natural groundwater environment and the way water reaches the valley.
The flow can therefore vary depending on the season and the amount of available water. During winter, when spring water is limited, foam may occasionally appear in the stream. The presence of residential areas upstream also means that the water environment is influenced by human activity.
Despite these changes, the valley remains an important natural area where visitors can experience the greenery and waterside landscape of Yokohama.
One of the most striking structures in the area is Jingashita Elevated Bridge, which carries the elevated section of Yokohama Ring Road No. 2 across the valley.
The bridge was designed using a structural system known as a prestressed concrete hollow-slab continuous rigid-frame bridge. Its construction required special consideration because the road passes directly above a valuable natural environment.
Rather than simply covering the valley with a conventional elevated structure, the engineers adopted several measures to reduce the impact on the woodland and preserve the natural surroundings.
The upper and lower roadways were separated to help maintain sunlight within the forest. This arrangement allowed the existing trees to continue receiving natural light and reduced the visual and environmental impact of the elevated road.
The bridge foundations were also designed using a deep foundation construction method. This approach helped limit disturbance to the surrounding terrain and the natural environment.
As a result, many of the trees that originally grew in the valley have continued to develop between and beneath the bridge structures. The combination of mature woodland and modern civil engineering creates a distinctive landscape in which nature and infrastructure coexist.
The bridge’s elegant appearance and its approach to environmental preservation received recognition from the engineering community.
It received the Tanaka Award from the Japan Society of Civil Engineers in fiscal 2001, followed by the Japan Society of Civil Engineers Design Award Grand Prize in fiscal 2003.
These awards recognized the bridge’s design quality and its successful relationship with the surrounding natural landscape.
The space beneath the elevated bridge has been developed as Jingashita Valley Hiroba Park. This open area provides a place for visitors to rest and enjoy the surroundings while exploring the valley.
The park also demonstrates how the infrastructure project has been incorporated into the existing landscape, allowing the area beneath the road to serve a recreational purpose rather than remaining unused space.
Jingashita Valley is surrounded by several attractions that provide additional opportunities to explore the history, culture, and natural environment of the Hodogaya area.
The Nishiya Water Purification Plant is an important facility supporting Yokohama’s municipal water supply. Located nearby is the Yokohama Waterworks Museum, which opened in 1987 (Showa 62).
The museum introduces the history of the Yokohama water supply system, which is recognized as Japan’s first modern waterworks. Through its exhibits and historical materials, visitors can learn how modern water infrastructure developed in Yokohama and how the city established the systems needed to supply clean water to its growing population.
Combining a visit to the museum with a walk through Jingashita Valley offers an interesting way to understand both the natural water environment and the history of modern urban water management.
Kawashima Sugiyama Shrine is the traditional guardian shrine of the Kawashima district. It stands on elevated ground to the northeast of the valley and is closely connected with the local community.
Its location on higher ground provides a glimpse into the area’s traditional settlement patterns and local religious heritage.
Tsumakoi Inari is a small shrine located approximately 100 meters southwest of Kawashima Sugiyama Shrine. It has long been a place of worship for local residents and forms part of the area’s network of neighborhood shrines.
Kami-Hoshikawa Sugiyama Shrine serves as the traditional guardian shrine of the Kami-Hoshikawa area. It is valued by the local community as a place of worship and a symbol of regional identity.
Fujisan Shrine is the traditional guardian shrine of the Nishiya district. It was established as a branch shrine of Kami-Hoshikawa Sugiyama Shrine.
Within its grounds is a small artificial mound known as Nishiya Fuji. Such mounds, called Fujizuka, were created to represent Mount Fuji and allow people to undertake a symbolic pilgrimage without traveling to the actual mountain.
Shokanji Kannon Hall is associated with the former Kozukue Domain’s Thirty-Three Kannon Pilgrimage. It is recognized as the fifth sacred site in this historic pilgrimage route and reflects the region’s traditional Buddhist devotional culture.
Zuiryuin Temple is another religious site associated with the former Kozukue Domain’s Thirty-Three Kannon Pilgrimage. It is known as the sixth sacred site along the route.
Myofukuji is a local Buddhist temple that has been familiar to residents of the surrounding neighborhood for generations. It offers another opportunity to discover the area’s traditional religious heritage.
Tokoji Temple is a historic-looking Buddhist temple in the surrounding area. Its traditional atmosphere adds to the cultural character of the neighborhoods around Jingashita Valley.
Jingashita Valley offers a refreshing contrast to the busy streets and waterfront attractions for which Yokohama is famous. Its woodland, stream, and quiet paths create an opportunity to experience a natural landscape without leaving the city.
The valley is particularly interesting because of the way its environment has been preserved alongside modern infrastructure. The elevated bridge, with its award-winning design, provides a striking example of engineering that takes the surrounding woodland into consideration.
Visitors interested in local history can also explore the legend of Wada Yoshimori, visit nearby shrines and temples, or learn about the development of modern waterworks at the Yokohama Waterworks Museum.
For travelers wishing to discover a quieter and less familiar side of Yokohama, Jingashita Valley is a rewarding destination where nature, engineering, and local history come together.