'Ultimate Ninja' was part of the Ocho earlier: it's obstacle racing, which is trying to get Olympic attention as part of the new-look modern pentathlon. Because of Ninja Warrior's influence 'ninja' is just a basic word in the sport now. https://www.youtube.com/watch?v=fPgjKYBCquA
Big difference here, a single failure doesn't mean you're done. Unlike a TV show, they don't want to leave the outcome up to the order in which they happen to present the obstacles to you.
