K-1 World MAX 2006 Champions Challenge was a kickboxing event promoted by the K-1 organization. The majority of the matches featured some of the world's best fighters against the best fighters in Japan, and were all fought under K-1 MAX Rules (70 kg/152 lb weight class). In total there were twenty-four fighters, representing twelve countries. The main event involved K-1 MAX 2006 runner up Andy Souwer against Japanese kickboxer Taishin Kohiruimaki. It was held in Tokyo, at the Ariake Colosseum, on Monday, September 4, 2006.