Osamu Kido made his debut for Japanese Wrestling Association on February 21, 1969, against Hirokatsu Shinkai (Motoyuki Kitazawa/Shoji Kai).

Afterwards, he went to the United States to train in Florida with the legendary Karl Gotch, who called Kido "his son."

In 1993, Kido took part in the G1 Climax; he defeated WAR's Takashi Ishikawa in the first round, but lost to eventual winner Tatsumi Fujinami in the quarterfinals.

In 1995, Kido teamed with Kazuo Yamazaki for the Super Grade Tag League; they lost to Masahiro Chono and Hiroyoshi Tenzan in the finals.

Five years later, he took part in his last tournament in NJPW, the G1 Climax; he placed dead last on Block B with no points, tying with Hiro Saito.

Aside from a battle royal in May 2003, Kido would focus on training rookies at the NJPW Dojo, including Shinsuke Nakamura.