After graduating from university he found employment at the Japanese National Police Agency. By defeating powerful judo athletes like Tamerlan Tmenov (Russia) at the 2003 World Judo Championships in Osaka, he became world champion in the +100 kg division at the age of 22. At the 2007 World Judo Championships in Rio de Janeiro he was victorious in the open division.
After completing his university education, he found work with the Japanese National Police Agency. By defeating notable judo competitors such as Tamerlan Tmenov (Russia) at the 2003 World Judo Championships in Osaka, he became a world champion in the +100 kg category at age 22. At the 2007 World Judo Championships in Rio de Janeiro, he secured victory in the open division.