He was born in Kadoma, Osaka, and lives in Yokohama, Kanagawa.

Lee won his first fight by third-round KO in 2005.

He captured the WBA super bantamweight title against Thai Poonsawat Kratingdaenggym on October 2, 2010 at Korakuen Hall, Tokyo, Japan.

[1] He earned a 5 million yen bonus for the fight.

Lee is also affiliated with Chongryon, or the General Association of Korean Residents in Japan, a group of ethnic Koreans in Japan that is sympathetic to North Korea.