K-1 Grand Prix '93 was a martial arts event held by the K-1 organization on April 30, 1993 at the Yoyogi National Gymnasium in Tokyo, Japan, thetournament winner was Branko Cikatić who defeated Ernesto Hoost in the final, Hoost is a Dutch kickboxer, he announced his retirement on December 2, 2006 after the K-1 World GP Final tournament in Tokyo Dome, in which country?