Approximately 13 Kilometers of Cliffs and Rock Formations
The dramatic coastline extends for approximately 13 kilometers along the western side of Nishinoshima. Over countless years, powerful waves and winds from the Sea of Japan have eroded the volcanic landscape, gradually creating steep cliffs, caves, arches, and unusual rock formations.
Among the most striking features are the exposed walls of basalt. Cliffs exceeding 100 meters in height continue along sections of the coast, creating an overwhelming sense of scale.
Standing above the coastline, visitors can watch waves breaking against the rocks far below and appreciate the immense natural forces that continue to shape the island.
Matengai Cliff — A Dramatic Symbol of Kuniga Coast
The most famous landmark of Kuniga Coast is Matengai Cliff. Rising approximately 257 meters above sea level, it is one of Japan’s largest sea cliffs.
The cliff rises almost vertically, with a profile that looks as though the mountainside has been cut by an enormous knife. From the top, visitors can look across the deep blue waters of the Sea of Japan and down toward the rugged coastline.
Yet the landscape immediately above the cliff is surprisingly gentle. Wide grasslands spread across the plateau, where cattle and horses graze. The contrast between the towering cliffs and peaceful pastureland creates one of the most distinctive landscapes in the Oki Islands.
Natural Wonders Created by the Sea
Kuniga Coast is dotted with numerous rock formations and caves created by erosion. One of the best known is Tsutenkyo Bridge, a spectacular natural rock arch.
The arch was formed from a former sea cave. As erosion and collapse gradually enlarged the cave, part of the original entrance remained standing, creating the impressive natural bridge seen today.
Another remarkable feature is Meian no Iwaya, a sea cave approximately 200 meters long. The cave was carved into the coastline by the relentless action of the sea.
Inside the cave, darkness and reflected light create a mysterious atmosphere. When conditions allow boats to enter, the sight of the deep blue sea appearing beyond the darkness of the cave can be an unforgettable experience.
Rock Formations with Names from Legends and Imagination
Many other unusual rocks can be found along the coast, including Onigajo, Kanabō-iwa, Ryugujo, Otohime Goten, Kannon-iwa, and Tenjokai.
The imaginative names given to these formations evoke Japanese legends, mythical palaces, heavenly realms, and supernatural beings. Exploring the coastline can feel almost like entering a world of ancient stories.
Geology Revealing Millions of Years of Earth History
The landscape of Kuniga Coast was shaped by volcanic activity between approximately 6.3 and 5.3 million years ago, followed by millions of years of erosion by the sea.
Layers of basaltic lava were deposited over time, leaving behind distinctive geological strata that reveal traces of the island’s volcanic past. Along the coast, visitors can observe structures such as wave-cut platforms and isolated rocks, which help illustrate how the coastline has changed over geological time.
For this reason, Kuniga Coast is not only a scenic destination but also an important site for understanding the geological history of the Oki Islands.
Walking the Clifftop Trails
Kuniga Coast can be explored on foot, with hiking trails providing opportunities to experience the landscape from land. One of the most popular routes runs from Matengai Cliff to Kunigahama Beach.
The trail is approximately 1 kilometer long with a difference in elevation of around 250 meters. Walking at a relaxed pace takes about one hour.
Several viewpoints along the route offer impressive views of Matengai Cliff and Tsutenkyo Bridge. The trail has also been selected as one of the “100 Selected Walking Routes” by the Yomiuri Shimbun newspaper.
From spring through autumn, seasonal wildflowers such as Oki thistle and Daruma aster add color to the grasslands and cliffs.
See the Cliffs from the Sea
For a more dramatic perspective, visitors can take a sightseeing boat cruise along Kuniga Coast. Looking upward from the water makes the cliffs appear even more immense, while the caves and rock formations reveal shapes that are difficult to appreciate from land.
Boats pass close to landmarks such as Tsutenkyo Bridge and Meian no Iwaya. When sea conditions are favorable, boats may also enter the cave itself, allowing passengers to experience the contrast between the dark interior and the brilliant blue sea beyond.
Boat cruises generally operate from spring through autumn and take approximately two hours, although schedules and routes can vary depending on conditions.
Sea Kayaking, Snorkeling, and Other Outdoor Activities
Kuniga Coast is also an excellent setting for outdoor activities. Depending on the season and local conditions, visitors can enjoy experiences such as sea kayaking, snorkeling, and diving.
The clear surrounding waters provide opportunities to experience the marine environment as well as the dramatic landscape above the sea.
Another option is to travel by electric bicycle or car to the area around Matengai Cliff and then walk approximately 2.3 kilometers to Tsutenkyo Bridge. This allows visitors to enjoy the scenery at a more relaxed pace without attempting the longer hiking route.
Getting to Kuniga Coast
Kuniga Coast can be reached from Beppu Port, the main gateway to Nishinoshima, by municipal bus in approximately 20 minutes.
During the main sightseeing season, sightseeing boats also operate, allowing visitors to experience the coastline from both land and sea.
Public transportation on Nishinoshima is relatively limited, so travelers should check bus and boat schedules in advance and allow plenty of time when planning their visit. Weather and sea conditions may also affect outdoor activities and boat operations.
A Landscape Where Cliffs, Caves, Grasslands, and the Sea Meet
Kuniga Coast is one of the most extraordinary landscapes in the Oki Islands. Towering cliffs, unusual volcanic rocks, sea caves, natural arches, and peaceful grasslands come together to create scenery that is difficult to find elsewhere in Japan.
Matengai Cliff provides an unforgettable view from above, while Tsutenkyo Bridge and Meian no Iwaya reveal the remarkable forms created by the sea. Hiking trails offer a close connection with the landscape, while sightseeing boats provide a completely different perspective from the water.
At the same time, the exposed volcanic formations tell a story that stretches back millions of years, making Kuniga Coast an important part of the Oki UNESCO Global Geopark.
Whether you are interested in dramatic scenery, geology, hiking, marine activities, or simply experiencing the untamed beauty of Japan’s remote islands, Kuniga Coast offers a memorable encounter with the powerful forces of nature.