Nippon Kempo
Since the first UFC event in 1993, ground fighting and positioning have become important elements in modern combat sports. One of the reasons for Sayama to found Nippon Kempo was the lack of ground fighting and positioning in Judo. In Japan, Nippon Kempo is credited in helping dispel notions that Judo would be enough to repel submission grappling styles in vein of Pankration.