Yamamuro competed for the national team at the 2012 Summer Olympics in the Men's artistic team all-around. In the team final, he injured his ankle on the vault event, and had to be helped off. He had qualified for the individual all-around final, but due to the injury was unable to compete. This gave a chance for his teammate Kazuhito Tanaka to compete - he had ranked behind Yamamuro and Kōhei Uchimura and had not qualified due to the 2-per-country rule.