Hirata made his debut in New Japan Pro Wrestling on August 26, 1978, against Yoshiaki Fujiwara. In November 1982, he left on an overseas training expedition to Mexico, and later Canada, where in Stu Hart's Stampede Wrestling he would create the famous Super Strong Machine persona, as well as use a First Nations gimmick as Sonny Two Rivers. In April 1986, he left NJPW with Riki Choshu for rival wrestling promotion, All Japan Pro Wrestling. In June 1987, he returned to NJPW and would soon capture the IWGP Tag Team Championship on three separate occasions with George Takano, Hiro Saito, and Shinya Hashimoto as his tag team partners. In the fall of 1986, the World Wrestling Federation introduced a stable of wrestlers called The Machines -- "The Giant Machine", "Big Machine", and "Super Machine" -- based on Junji Hirata's popular Super Strong Machine gimmick. In 1984, Hirata had tried to make his own "Machines" stable with Korean wrestler Yang Seung-hi and veteran Yasu Fuji as Strong Machine #2 and Strong Machine #3 respectively, but this version of the stable did not have the exposure or push of their American counterparts. Hirata briefly turned face and became "Super" Strong Machine, feuding with his former partners. When Hirata left for Japan Pro, Fuji retired and Yang went back to South Korea. In December 1994, after Masahiro Chonoturned on him, he finally unmasked, dropping the Super Strong Machine character and wrestling under his real name. He revived the Super Strong Machine persona for the first time in six years in October 2000, having a brief feud with T2000 Machine. In 2005, Hirata, as the masked persona of Black Strong Machine, became a regular fixture on NJPW shows reconciled with Chono and part of his Black New Japan stable. He also had a brief stint in AJPW as Super Love Machine, the leader of the Love Machines, this time taking as partners Arashi as Love Machine Storm and Gran Hamada as Mini Love Machine. Whatever role he plays, Junji Hirata is a very respected veteran and is well liked by wrestlers, officials, and fans alike. In the late 2000s, Hirata was a founding member of the Legend and Seigigun stables. He wrestled his to date final match on April 2, 2014, at Wataru Inoue's retirement event. He now works as a trainer at the NJPW dojo. On April 12, 2018, it was announced that he was retiring from active competition. His retirement ceremony was held on June 19 at Korakuen Hall.
