Kirk here. I had no idea that diving competitions were every held in Takachiho. Thanks to Explore Kumamoto for the information!

https://www.facebook.com/explorekumamoto/posts/pfbid032cnePhVFKSgeVuYdC26m5rn8tFBzcdGquiRLLkSg9S9Usejz2fMNrPjYEKmPG791l