Lee is the South Korea national team's primary half-middleweight fighter, having represented them at the 2014 and 2015 World Judo Championships. He was also chosen as the half-middleweight representative in the 2015 World team competition, where he won a silver medal.[4][5]
His main skill is seoi nage, a trademark of the Korea national team.[6]
Lee became Korea's half-middleweight representative after defeating double world champion Wang Ki-chun as the latter ascended from lightweight.[9] He has consistently won the national title in the weight division, however lost to Wang in the 2015 Korea National Championships.[10]
Lee is ranked No. 29 in the world rankings,[11] and is the second ranked in Korea for the Olympic qualifiers after Wang.