(2008–2014) Iizuka's career would make a radical change in April 2008. During a tag team match with Hiroyoshi Tenzan against then-IWGP Tag Team Champions, Togi Makabe and Toru Yano, Iizuka turned on Tenzan with his trademark sleeper hold, turning heel and joining G.B.H. as their newest member and their insider in the New Japan Seikigun. Upon his heel turn, Iizuka changed his look and wrestling style, shaving his head bald, growing a sinister beard, and adapting a hardcore wrestling style. He was also given the gimmick of an uncontrollable madman, often making his entrances through crowds, violently pushing fans and announcers around. He also began frequently using an iron glove on opponents as his main weapon of choice. For a brief period, Iizuka was also given the nickname: "The Great Traitor" for his betrayal of the New Japan Seikigun. His first major feud after turning was with the man he betrayed, Tenzan. The two first fought on July 8, 2008, in a Lumberjack Death Match which Tenzan won. The two fought again on October 13, 2008, at Destruction '08 in a Chain Death Match which Iizuka won. Since then Iizuka has gone on to feud with Yuji Nagata, again defeating him in a Chain Death Match on April 5, 2009 but would lose the rematch on May 3, 2009, at Wrestling Dontaku 2009. In early 2009, Iizuka, along with most of his stablemates, turned on G.B.H. to join Shinsuke Nakamura's new Chaos group, and in mid-2009 he rekindled his feud with the returning Tenzan. The two would have a third match on July 20, 2009 which would be another Chain Death Match, this time though Tenzan would defeat Iizuka by knockout to end the feud. During the G1 Climax tournament in 2009, Iizuka lost five out of his six matches, mostly by disqualification, due to the use of his iron glove and his new weapon, a steel toothguard. His only non-disqualification loss was to Shinsuke Nakamura by pinfall. And, his only win came against his former tag team partner, Yuji Nagata, who got himself disqualified by throwing the referee out of the ring, whilst he was making his comeback, following Iizuka's repeated use of the steel toothguard and interference from Tomohiro Ishii. On January 4, 2010, Iizuka teamed with fellow CHAOS members Yano and Ishii and Abdullah the Butcher against Riki Choshu, Masahiro Chono, Manabu Nakanishi, and Terry Funk. Iizuka's