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UWFi (Universal Wrestling Federation) was a shoot-style wrestling promotion where Sakuraba competed. Shoot-style wrestling is a hybrid style that combines elements of professional wrestling and martial arts, emphasizing realism and athleticism. UWFi was known for its intense and competitive matches, which often featured real combat techniques. Sakuraba's success in UWFi helped establish his reputation as one of the most skilled and respected fighters in the sport.