His next fight was a kickboxing match in Sapporo at K-1 Revenge on July 30, 2006, where he fought Asian GP champion Yusuke Fujimoto. Ologun earned the ire of the referee with unsportsmanlike conduct as he tripped and pushed over Fujimoto repeatedly, trying to punch at him afterward, and going for sucker punches after gesturing for a break, all of which led to a yellow card. At the end of the 3rd round, he tripped Fujimoto one last time and then stood over him in an unsportsmanlike fashion. Added to the knockdown he suffered in the first round, he lost his first fight and his first under K-1 rules by unanimous decision.