On March 27, 2014, Styles signed a contract with New Japan Pro Wrestling. He debuted at Invasion Attack 2014 on April 6 where he attacked the IWGP Heavyweight Champion Kazuchika Okada and hit his finishing move, the "Styles Clash" on him. Styles then said that he was the new leader of Bullet Club. This came after Prince Devitt, the former leader of Bullet Club, had to leave the company after losing a Loser Leaves Town match against his rival Ryusuke Taguchi.