Yoshihiro Akiyama
Japanese judoka and mixed martial arts (MMA) fighter
Yoshihiro Akiyama (Japanese: 秋山 成勲; born July 29, 1975), also known as Choo Sung-hoon (Korean: 추성훈) and by his nickname Sexyama, 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. He is the former K-1 HERO's Light Heavyweight Grand Prix Tournament Champion.
Judo career
Before his professional mixed martial arts career, Akiyama was a decorated Judoka. He began training in Judo at the age of three. He has also trained karate, boxing, kickboxing, wrestling and also submission wrestling with Greg Jackson.
2001 Asian championships
Representing South Korea, Choo won the gold medal at the 2001 Asian Judo Championships.
2002 Asian Games
Representing Japan, Akiyama won the gold medal at the 2002 Asian Games defeating Ahn Dong-Jin of South Korea in the finals.
2003 World Judo Championships controversy
Akiyama defeated three opponents from France, Mongolia and Turkey to reach the semi-finals of the 81 kg Light Middleweight division. However, all three opponents claimed that Akiyama had a slippery judogi. Wearing a reserve gi, Akiyama lost two games in a row (semifinal and 3rd-place match) and missed the medal.
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Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Jun 30, 2026. The linked authority identifier is Q487335. VIAF identifies the subject as 102933845. The Library of Congress control number is n2009073358. 2 of 3 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1975, 2001, 2002 and 2003.
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This entry incorporates text from “Yoshihiro Akiyama” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.