KO-D Openweight Championship
On July 1, 2004, Ibushi made his professional wrestling debut for Dramatic Dream Team (DDT), losing to Kudo. In 2005, Ibushi won his first championship, when he and Daichi Kakimoto defeated Darkside Hero! and Toru Owashi to win the KO-D Tag Team Championship. On June 25, 2006, he lost to Danshoku Dino in a match for the Championship and spent most of later 2006 competing in multiple tag team matches. In 2007 Ibushi's fortunes fared better and he began to win more matches, including defeating BxB Hulk at a co-promoted event held by DDT and Dragon Gate. Later in 2007, Ibushi defeated Madoka to win the vacant Independent World Junior Heavyweight Championship. In February 2008, Ibushi defeated Tanomusaku Toba to retain the Independent World Junior Heavyweight Championship and win the Ironman Heavymetalweight Championship. He would go on to lose the Ironman championship to Danshoku Dino. On July 20, 2008, Ibushi would defeat Kudo in the Next KO-D Openweight Championship One Day Tournament finals but would ultimately lose to the KO-D champion Dick Togo a month later.