sentences:  After his excursion in Mexico, Koshinaka joined New Japan Pro Wrestling in September 1985.On February 6, 1986, he defeated The Cobra in a tournament to become the inaugural IWGP Junior Heavyweight Champion.At the same time, NJPW was in a feud with the shoot-style UWF promotion, and Koshinaka was immediately put in a feud with Nobuhiko Takada, who at one time was Antonio Inoki's protégé, just like Koshinaka was Giant Baba's.