Ogawa Waterfall is a beautiful waterfall located in Nejime-Kawakita, Minamiosumi Town, Kimotsuki District, Kagoshima Prefecture. It lies in the upper reaches of the Ogawa River, which flows through the central area of Minamiosumi Town on the southern Osumi Peninsula.
The waterfall is famous for the striking emerald-green color of its plunge pool and the broad rock face from which water emerges through narrow openings. Its secluded setting and distinctive geological formations create a dramatic natural landscape that attracts visitors from throughout Japan.
Ogawa Waterfall is located in the northern part of Minamiosumi Town, in the southern portion of the Osumi Peninsula in southeastern Kagoshima Prefecture.
From the town center, visitors follow the Ogawa River upstream to reach the waterfall area. The nearest parking facility is the Ogawa Waterfall Walking Trail Parking Area. From there, visitors walk approximately 1.2 kilometers along a riverside trail to reach the waterfall viewing area.
The waterfall was formed as the Ogawa River eroded the surrounding Shirasu plateau, a landscape created from volcanic deposits. It has a drop of approximately 46 meters and a width of about 60 meters.
The broad rock face features columnar jointing, a geological structure in which rocks form column-like patterns. Groundwater flows out through gaps in the rock, creating numerous delicate streams across the cliff face.
The plunge pool at the base of the waterfall is renowned for its beautiful emerald-green surface. The color contrasts with the dark rock formations and the delicate streams of water emerging from the cliff.
The appearance of the pool changes according to the volume of water. Depending on rainfall and river conditions, the water may not always display the vivid emerald color for which the waterfall is famous.
Ogawa Waterfall has been known as a scenic attraction for a long time. It is recorded in the Sangoku Meisho Zue, a geographical and illustrated guide to famous places compiled by the Satsuma Domain in 1843 during the late Edo period.
Its recognition as a tourist destination increased in 2013, when the waterfall was featured in a calendar published by Kagoshima Bank.
The waterfall became even more widely known in 2018, when images of it were used in the opening sequence of the NHK historical television drama Segodon. The dramatic scenery introduced the waterfall to a much wider audience.
Ogawa Waterfall was formerly part of Osumi Southern Prefectural Natural Park. On August 10, 2018, a total area of 95 hectares, including the waterfall and the gorge downstream, was incorporated into Kirishima-Kinkowan National Park.
This change strengthened the area’s protection as part of a national park and recognized the importance of preserving its distinctive natural environment.
There are two main viewing areas at Ogawa Waterfall. The upstream observatory allows visitors to look down toward the waterfall and its plunge pool from above.
From this viewpoint, visitors can appreciate the waterfall in relation to the surrounding gorge and river landscape.
The main Ogawa Waterfall Observatory provides a closer view of the plunge pool and the rock face. It is located at the end of the walking trail from the parking area.
The observatory is a two-story wooden structure. From here, visitors can look directly toward the emerald-green pool and observe the groundwater flowing from the gaps in the columnar-jointed rock face.
The walking trail is approximately 1,200 meters long and follows the clear waters of the Ogawa River.
Along the route, visitors can see Takimi Ohashi Bridge overhead. The bridge offers views of the area around the upstream observatory and adds another distinctive feature to the landscape.
Bamboo groves grow along parts of the trail, creating a quiet and refreshing atmosphere. The sound of the river and the surrounding greenery make the walk itself an enjoyable part of the visit.
The trail begins near the parking area, where there is a café serving light refreshments and a restroom. These facilities are convenient for visitors preparing for the walk or taking a break afterward.
There is no public transportation service directly to Ogawa Waterfall. Visitors generally need to travel by car to the walking trail parking area.
Some sections of the road leading to the parking area are narrow, so drivers should proceed carefully and be considerate of oncoming vehicles.
The parking area can accommodate approximately 70 vehicles. From there, visitors walk along the maintained trail to the observatory.
Because the color and appearance of the plunge pool depend on water conditions, the scenery may differ from photographs taken at other times. Visitors should also take care on the walking trail, particularly when the ground is wet.
Downstream from the walking trail is Ogawa Power Station, one of the largest power stations in Kagoshima Prefecture.
The facility was constructed in 1920. Water is taken from the river just upstream of the waterfall and used for power generation.
The power station provides an example of how the river has been used not only as a natural attraction but also as a source of energy. Visitors can appreciate the relationship between the area’s natural scenery and the engineering works developed to make use of its water resources.
Ogawa Waterfall is a remarkable natural attraction where geological formations, clear river water, and lush vegetation come together. Its 46-meter drop and 60-meter width create an impressive scene, while groundwater flowing through the columnar-jointed rock face adds delicate detail to the broad cliff.
The approximately 1.2-kilometer trail follows the river through bamboo groves and offers a pleasant approach to the waterfall. At the wooden observatory, visitors can enjoy a close view of the emerald-green plunge pool.
Known since the Edo period and brought to wider attention through a bank calendar and a popular television drama, Ogawa Waterfall is now one of the best-known scenic destinations on the Osumi Peninsula.