On August 10, 2025, Kōryō High School of Hiroshima withdrew from the national summer high school baseball tournament at Kōshien. The team had won its first game, 3 to 1. It gave up its second-round game.
In January of that year, several members of the school’s baseball club had committed violent acts against younger members. In March, the Japan High School Baseball Federation had given the school a formal warning.