Antonio José Díaz Fernández (born June 12, 1980 in Caracas) is a Venezuelan karateka.
He is best known for winning gold medals in kata at the World Championships in Serbia (2010) and France (2012), winning of the World Games in Cali, Colombia (2013), and Duisburg, Germany (2015), and a silver medal in the World Championships in Japan 2008.
He won bronze medals at the WKF World Championships in karate in 2002, 2004, 2006, 2014, and 2016 in the men's individual kata.
He has also won 23 Pan American Karate Federation Senior Championships Medals 23 times to date.Antonio Díaz holds the Most medals won at the World Karate Championship Guinness World Records.