IWGPジュニアヘビー級王座
Ibushi returned to New Japan on June 16 at Dominion 6.16, when he, Daisuke Sasaki and Kenny Omega defeated Bushi, Kushida and Prince Devitt in a six-man tag team match. Later in the event, Ibushi challenged Low Ki to a match for the IWGP Junior Heavyweight Championship. On July 29, Ibushi defeated Low Ki to also win the IWGP Junior Heavyweight Championship for the second time. Ibushi made his first successful title defense on September 7, defeating Kushida. Ibushi followed up by also successfully defending the title against Ryusuke Taguchi on September 23 at Destruction. On October 8 at King of Pro-Wrestling, Ibushi lost the title back to Low Ki. On January 4, 2013, at Wrestle Kingdom 7 in Tokyo Dome, Ibushi unsuccessfully challenged Prince Devitt for the IWGP Junior Heavyweight Championship in a three-way match, which also included Low Ki. On July 5, Ibushi was announced as a surprise participant in the 2013 G1 Climax. He increased his weight from to to prepare himself for the heavyweight-level tournament. Ibushi finished the tournament with four wins and five losses, failing to advance from his block.