秋成勋

Yoshihiro Akiyama (Japanese: 秋山 成勲, born July 29, 1975), also known as Choo Sung-hoon (추성훈), is a Japanese mixed martial artist and judoka who won the gold medal at the 2001 Asian Championships for South Korea and for Japan at the 2002 Asian Games. 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.