[citation needed] Saito made his pro wrestling debut in Pioneer Senshi and spent much of his early career in W*ING, a small promotion where he enjoyed moderate success.
[citation needed] Saito would go on to form his own stable, Dark Agents, with Takashi Sugiura, Masao Inoue and former Heisei Ishingun stablemate Shiro Koshinaka.
[citation needed] From March 29 to April 27, 2008, Saito and partner Bison Smith featured in NOAH's inaugural Global Tag League.
[1] As a result, the duo became number one contenders and on May 23, 2008, Saito and Smith defeated Naomichi Marufuji and Takashi Sugiura to win the GHC Tag Team Titles.
[citation needed] The pair finished fourth in the eight-team block missing out on a spot in the final by only having lost to second place Takeshi Morishima and Kensuke Sasaki.
[citation needed] Saito and partner Jun Akiyama received their title shot on May 8 against Takuma Sano and Yoshihiro Takayama, though the pair ultimately fell short in the attempt to win the championships.
[citation needed] On January 22, Saito and Akiyama defeated Bad Intentions (Giant Bernard and Karl Anderson) to win the GHC Tag Team Championship.
[citation needed] On May 23, Saito went to Tenryu Project, teaming up with fellow Heisei Ishingun member The Great Kabuki to defeat KAMIKAZE and Onryo.
[citation needed] On October 26, he won back the GHC Tag Team Championship, this time with Go Shiozaki, from KENTA and Maybach Taniguchi, ending their 18-day reign.
[citation needed] The pair finished with four points having defeated the team of Mitsuhiro Kitamiya and Super Crazy as well as Colt Cabana and Chris Hero.
[citation needed] On July 28, 2018, Saito and Naomichi Marufuji defeated The Aggression (Katsuhiko Nakajima and Masa Kitamiya) to win the GHC Tag Team Championship.