This is my wife and I taking the rowboat tour of Takachiho Gorge in Takachiho, Miyazaki-ken, on Kyuushuu, Japan. You rent the boat and are given 30 minutes to explore the allowed area of the river and canyon. Its easy to make it to the end (it's roped off) and back within that time.
Some people we saw just wanted to sit near the waterfalls which looked fun too.
Thanks for posting. My friend and I used to do jumps from the bridge near the top. It was about a 17 meter jump.
wiserabbitknows 2 years ago