He originally was a delinquent who often got into fights. Because of his strength, he usually left his victims with serious injuries. He was disowned by his family due to a brawl he initiated with some fans who were booing his older brother in a rugby match. By the time the brawl was over, at least twenty people were injured. After the incident, Takamura continues to street fight until he meets Coach Kamogawa. After weeks of training, and without a single sparring session, Takamura defeats his first opponent twenty-five seconds into the first round. He works his way to becoming the JBC Middleweight Champion, and then moves on to defeat Bryan Hawk to become the WBC Junior Middleweight Champion, and then beats David Eagle for the WBC Middleweight Championship, and then beats Richard Bison to win the WBA Middleweight Championship and unify both the WBC and WBA Middleweight Championships (which makes him the only current World Champion from Japan). His current aspiration is to conquer the next four classes up through heavyweight, but first he must win his upcoming fight for a Super Middleweight Championship.