After six straight all-around world titles and an Olympic all-around gold, Japan’s Kohei Uchimura has cemented his place as the king of men’s gymnastics. Uchimura is the son of two competitive gymnasts and began the sport at age 3 when they opened a gym. Despite having five Olympic and 19 world championship medals, Uchimura has two pieces of unfinished business motivating him in Rio: a team gold for Japan and a second all-around title. Uchimura and his teammates had to settle for silver in 2008 and 2012, with rival team China taking gold. And if Uchimura can successfully defend his all-around Olympic title, he’ll be the first man since 1972 to accomplish that feat.