KO-D無差別級王座
On October 23, Omega defeated Kai to become the new World Junior Heavyweight Champion. He lost the title back to Kai on May 27, 2012, in his sixth title defense. On December 23, Omega defeated El Generico to win the KO-D Openweight Championship for the first time. On January 27, 2013, Omega defeated Isami Kodaka in a title vs. title match, retaining his title and winning the DDT Extreme Championship held by Kodaka. He lost the KO-D Openweight Championship to Shigehiro Irie on March 20, 2013. On May 26, Omega, Ibushi, and Gota Ihashi defeated Yuji Hino, Antonio Honda, and Daisuke Sasaki to win the KO-D 6-Man Tag Team Championship. Omega's team lost the championship to Hino, Honda, and Hoshitango. On August 25, Omega lost the DDT Extreme Championship to Danshoku Dino.