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Yakushima NP, Kagoshima
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Usually split into 2 streams, Oko-no-Taki can become one powerful torrent during the rainy season and typhoons. In seasonal floods, the river has even reached the parking area—an astonishing reminder of how quickly this waterfall can change.
Selected for Japan’s 100 Waterfalls in 1990, Oko-no-Taki plunges 88 meters from a site just 20 meters above sea level, near the river mouth. That’s a dramatic drop packed into Yakushima’s coastal lowlands.
The waterfall’s dark rock is hornfels: seafloor sediments laid down about 40 million years ago and later baked hard by the intrusion of Yakushima granite. The cliff is a dramatic meeting place of very different chapters in the island’s geological past.
Oko-no-Taki is one of only 2 waterfalls on Yakushima where visitors can get close to the cascade. From nearby, its echoing roar and cool spray become part of the experience—not just something to see from a distant viewpoint.
Look above the river in autumn and you may spot dragonflies circling near the waterfall. It’s a small seasonal detail noted in the Japan Tourism Agency’s guide to Oko-no-Taki—a different kind of movement amid all that falling water.
The walk to Oko-no-Taki passes through evergreen forest, where wild gardenias grow beside the trail. Their yellow fruits add a bright botanical detail to the shady route toward the waterfall.
