#4 Kang Hee Gun
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He is a rapper in the hip-hop duo LeeSsang with his partner named Gil, a songwriter, record producer, television producer, a former break dancer, a restaurant owner and a cast member of the variety show "Running Man.
He also majored in specialized security at Yong In University, learning martial arts. He has been an amateur boxer for ten years and has an eighth degree black belt in Tae Kwon Do.
This is the last famous person that involves in martial arts that I want to talk about.
#5 Yoshihiro Akiyama
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Yoshihiro Akiyama also known as Choo Sung-hoon is a South Korean-Japanese mixed martial artist and judoka.
Akiyama won the gold medal at the 2001 Asian Championships for South Korea, and for Japan at the 2002 Asian Games.
He is also a fourth-generation Japanese of Korean descent, he acquired Japanese nationality in 2001. He is the former K-1 HERO's Light Heavyweight Grand Prix Tournament Champion.