Question: is choo sung hoon korean?
Answer: Yoshihiro Akiyama (秋山 成勲) (born July 29, 1975), also known as Sung-hoon Choo (추성훈), is a Japanese mixed martial artist and judoka. ... 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.