the final day. Styles and Naito faced off in a match on January 4, 2015, at Wrestle Kingdom 9 in Tokyo Dome, where Styles was victorious. On January 6, 2015, Styles inserted himself back into the IWGP Heavyweight Championship picture, when he pinned Tanahashi in an eight-man tag team match, setting up a title match between the two at The New Beginning in Osaka. On February 11, Styles defeated Tanahashi to win the IWGP Heavyweight Championship for the second time. Styles made his first title defense on April 5 at Invasion Attack, where he defeated 2015 New Japan Cup winner Kota Ibushi. His five-month reign ended in his second defense on July 5 at Dominion 7.5 in Osaka-jo Hall, where he was defeated by Kazuchika Okada. From July 20 to August 14, Styles took part in the 2015 G1 Climax. Styles entered the final day with a chance to advance from his block, but a loss against Hiroshi Tanahashi cost him a spot in the finals, giving him a record of six wins and three losses. On October 12 at King of Pro-Wrestling, Styles received a rematch for the IWGP Heavyweight Championship, but was again defeated by Okada. In November, Styles entered the IWGP Intercontinental Championship picture by challenging Shinsuke Nakamura to a title match. Later that month, Styles was forced to pull out of the 2015 World Tag League, where he teamed with Yujiro Takahashi, after experiencing a back injury. Styles returned to the NJPW ring on January 4, 2016, at Wrestle Kingdom 10 in Tokyo Dome, where he unsuccessfully challenged Shinsuke Nakamura for the IWGP Intercontinental Championship. Hours after Styles' Wrestle Kingdom 10 match, it was reported that Styles had given his notice to NJPW on the morning of January 4, announcing that he was leaving the promotion and signing with WWE. The following day, Styles made his final appearance for NJPW, where the rest of Bullet Club turned on him with Kenny Omega becoming the stable's new leader. WWE (2016–present) Championship Victories and Feud with John Cena (2016–2017) After weeks of speculation and WWE themselves covering the rumors of Styles leaving NJPW for WWE, on January 20, 2016, it was confirmed that he had signed with WWE. Prior to signing, Styles had also had extensive discussions with TNA and according to them, Styles had agreed to return to the promotion with Bullet Club stablemates Doc Gallows and