 On October 3, 2014, NJPW held a press conference to announce that Omega was set to sign with the promotion once his DDT contract expired on October 26.Omega, dubbing himself the Cleaner, made his debut under contract on November 8 at Power Struggle, where he was revealed as the newest member of Bullet Club, despite having previously dismissed the idea of joining the villainous foreigner stable, claiming that he did not consider himself a "gaijin".Omega wrestled his first match as a member of Bullet Club at Wrestle Kingdom 9 in Tokyo Dome on January 4, 2015, defeating Ryusuke Taguchi to win the IWGP Junior Heavyweight Championship for the first time.