Japanese star Daiki Hashimoto defended his title at the world gymnastics championships on Thursday, overcoming an early mistake on floor exercise to become the first athlete to win back-to-back world all-around titles in eight years. The 22-year-old Hashimoto posted a total of 86.132, over a point clear of Illia Kovtun of Ukraine at 84.998. American teenager Fred Richard, a sophomore at Michigan, earned a surprising bronze at 84.332.