On February 6 , 1986 , he defeated The Cobra in a tournament to become the inaugural IWGP Junior Heavyweight Champion .
After his excursion in Mexico , Koshinaka joined New Japan Pro Wrestling in September 1985 .
On February 6 , 1986 , Koshinaka defeated The Cobra in a tournament to become the inaugural IWGP Junior Heavyweight Champion .
After his excursion in Mexico , Koshinaka joined New Japan Pro Wrestling in September 1985 .