As Japan pushes to strengthen safeguards in youth sports, a sexual assault case involving a former karate school head in a southwestern city has proved to be a stark example of the dangers that still persist.In February, a local branch of the Fukuoka District Court in Kitakyushu sentenced Tetsuya Nagasue to 24 years in prison for sexually assaulting eight female students between 2018 and 2024.According to the ruling, Nagasue engaged in sexual acts with the girls and inappropriate touching and photographed or filmed the abuse. He knew all of them were under the age of 13.The case has renewed…READ FULL ARTICLE