Naito and Okada being demoted to the semi-main event. The event was also set to feature Hirooki Goto's return match against Katsuyori Shibata. Goto had broken his jaw during the previous summer's G1 Climax tournament and made a surprise appearance on December 8 to request Shibata as his opponent in his return match at Wrestle Kingdom 8. The two former high school classmates had faced off three times since May 2013 with two matches ending in draws and Shibata winning once. They were scheduled to wrestle again during the G1 Climax, but Goto had to pull out of the tournament with his injury just prior to the match taking place. On October 14, 2013, mixed martial artists Daniel Gracie and Rolles Gracie appeared at King of Pro-Wrestling, announcing they would take part in Wrestle Kingdom 8. Later in the event, Kazushi Sakuraba and Yuji Nagata, after their match against each other, accepted the Gracies' challenge for a tag team match at Wrestle Kingdom 8. Sakuraba had previously created a name for himself on the mixed martial arts scene as the "Gracie Hunter". Event Wrestle Kingdom 8 was headlined by a "double main event", featuring Kazuchika Okada defending the IWGP Heavyweight Championship against Tetsuya Naito and Shinsuke Nakamura defending the IWGP Intercontinental Championship against Hiroshi Tanahashi. In the first of the main events, Okada made his seventh successful defense of the IWGP Heavyweight Championship against Naito, while the second main event saw Tanahashi defeat Nakamura to become the new IWGP Intercontinental Champion. The event also saw Kota Ibushi defeat Prince Devitt to become the new IWGP Junior Heavyweight Champion. Devitt wrestled the match covered in face and bodypaint, debuting what would later become his signature big match look and part of his "Demon" persona. After the match, Ibushi was approached by an unknown masked man, later identified as El Desperado, who handed him a bouquet of roses. In his return match, Hirooki Goto defeated Katsuyori Shibata, who afterwards helped him backstage. Other title matches included Satoshi Kojima defeat National Wrestling Alliance (NWA) representative Rob Conway to capture the NWA World Heavyweight Championship in a match that featured an appearance by Harley Race. This marked the first time the NWA title had changed hands in Japan since March 2002. Bullet Club's Doc Gallows and Karl Anderson, the winners of the 2013 World Tag League, defeated the Killer Elite Squad (Davey Boy Smith