Kuma River, one of Japan's three fastest rivers, is a rare gem in Kyushu where you can enjoy the exhilarating sport of rafting. More than just a tourist attraction, it's an adventure sport aimed at the younger crowd, where participants navigate the river's rapids in specialized rafting boats. With a professional instructor aboard each raft, even beginners can join in and have fun. Prepare for a thrill-packed experience as you get drenched by the spray or even take an unexpected plunge into the water while navigating downstream.