渕正信
In his first two years, Koshinaka would only gain victories in battle royals, while losing in singles matches to guys like Atsushi Onita, Masanobu Fuchi, Mitsuo Momota, Tor Hayashi, Munenori Higo, Lee Wang-pyo, and Yoshihiro Momota, before gaining his first victory in February 1981 against Masaji Goto. In 1983, Koshinaka defeated Mitsuharu Misawa to win the Lou Thesz Cup, his first tournament.