Shimonjo Waterfall is a beautiful waterfall in Oguni Town, Aso District, Kumamoto Prefecture. With a drop of approximately 49 meters, it plunges through a landscape of impressive rock formations and lush natural surroundings. The waterfall is one of the area’s notable natural attractions and offers visitors an opportunity to appreciate the dramatic scenery created by the geological history of the Aso region.
The waterfall and its surroundings are known for their columnar joints, distinctive rock formations associated with volcanic deposits. A park and walking paths have been developed around the waterfall, allowing visitors to enjoy the scenery from several viewpoints, including locations near the top of the falls and along the upper part of the right bank.
One of the main attractions at Shimonjo Waterfall is the columnar jointing developed in the pyroclastic-flow deposits originating from the Aso Caldera. These deposits preserve evidence of the powerful volcanic events that shaped the region.
Columnar joints are column-shaped cracks that develop in volcanic rock as it cools and contracts. The resulting geometric patterns create distinctive rock faces that are scientifically valuable as well as visually striking.
At Shimonjo Waterfall, the contrast between the falling water and the rugged rock formations makes the geological features especially impressive. Visitors can appreciate not only the force of the waterfall but also the natural processes that formed the surrounding landscape.
A route to the waterfall has been developed from Shimonjo Ohashi Bridge downstream, following the left bank toward the waterfall itself. The paths allow visitors to approach the falls and experience the scenery at close range.
Viewing platforms near the lip of the waterfall and on the upper right bank provide different perspectives on the cascade. From these points, visitors can look down toward the falling water and appreciate the depth of the gorge. Walking paths also lead toward the lower part of the waterfall, where the sound and force of the falling water can be experienced more directly.
Because the terrain around a waterfall can be wet and uneven, visitors should take care while walking and follow any signs or local instructions. Staying on the designated paths helps protect both visitors and the natural environment.
Close to Shimonjo Waterfall stands the Ginkgo Tree of Shimojo, a giant tree designated as a Natural Monument of Japan. Estimated to be more than 1,000 years old, it is known as the largest ginkgo tree in Kumamoto Prefecture.
The tree has a height of approximately 25 meters and a root circumference of around 21 meters. Its branches spread widely, creating a crown that can resemble a small forest when viewed from a distance. Walking paths around the tree allow visitors to appreciate its enormous size and historic character.
The ginkgo is traditionally regarded as the gravestone of Kazusa no Suke Tsunekata, a former lord of Shimojo Castle. Another local tradition, associated with the legend of Kagami Pond, identifies the tree as the gravestone of Magami, a wet nurse of Komatsu-no-oin, a granddaughter of Emperor Daigo.
These stories connect the giant tree with the area’s historical memories and local legends, adding cultural interest to a visit to the waterfall.
The ginkgo has long been associated with a local belief concerning breastfeeding. According to tradition, women who had difficulty producing breast milk prayed to the tree and drank a decoction made from its bark, believing that it would help increase their milk supply.
The tree is affectionately known by local people as “Chikobusan” or “Chichikobusan,” names associated with the distinctive growths on its trunk. Even today, the tree is regarded by some visitors as a sacred place where people pray for children, good relationships, and family blessings.
From the Kumamoto area, travel toward Oguni Town via National Route 212. The journey from the Ozu area is approximately 50 minutes, according to the source article.
From Kokonoe Interchange on the Oita Expressway, travel via National Route 387. The journey takes approximately 30 minutes.
Roadside Station Oguni, also known as Yu Station, is located nearby and can serve as a convenient stop when exploring the area. Visitors can combine a visit to Shimonjo Waterfall with the nearby Ginkgo Tree of Shimojo and other attractions around Oguni Town.
Shimonjo Waterfall combines a dramatic cascade, distinctive volcanic rock formations, and a peaceful natural setting. Its columnar joints reveal the geological history of the Aso region, while the walking paths and viewing platforms allow visitors to enjoy the waterfall from different angles.
The nearby Ginkgo Tree of Shimojo adds another dimension to the visit. This ancient tree, with its historical associations and local traditions, is a powerful symbol of the area’s natural and cultural heritage.
A visit to Shimonjo Waterfall offers a chance to experience both the force of nature and the stories passed down through generations in Oguni Town. The waterfall and giant ginkgo can be enjoyed together as part of a scenic excursion through the Aso region.