Debuting in 1986 under his real name, Iizuka formed the tag team J-J-Jacks with fellow dojo trainee Akira Nogami in 1992.

In June 1989, Iizuka and Hiroshi Hase went to the Soviet Union to be trained in sambo, where he would learn his signature maneuvers, the uranage and the Blizzard Suplex.

2000 proved to be a great year for Iizuka: on January 4, he teamed with Shinya Hashimoto in a victorious match against Naoya Ogawa and Kazunari Murakami.

[7] On July 20, he finally received a shot at the IWGP Heavyweight Championship, despite a losing effort against Kensuke Sasaki.

On March 9, 2008, after Hiroyoshi Tenzan was attacked by the rest of Great Bash Heel once again just weeks after he had been kicked out of the stable, Iizuka came to his aid, clearing the ring of Tomoaki Honma, Gedo and Jado.

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.

[19] 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.

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.

[2] 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.

On December 11, 2010, Iizuka restarted his feud with Hiroyoshi Tenzan, who had just returned after being sidelined for fifteen months due to an injury.

[21][22] On May 3, 2012, at Wrestling Dontaku 2012, Iizuka won his first title in sixteen years, when he and Toru Yano defeated Hiroyoshi Tenzan and Satoshi Kojima for the IWGP Tag Team Championship.

[25] In early 2013, Iizuka and Yano began making appearances for Pro Wrestling Noah, which led to them defeating Naomichi Marufuji and Takashi Sugiura for the GHC Tag Team Championship on March 10, 2013.

[30] Iizuka worked regularly for Noah until the storyline concluded in December 2016,[31] which led to the stable returning to NJPW on January 5, 2017.