sentences:  In August 1990, he went to Austria to Otto Wanz's Catch Wrestling Association to challenge Steve Wright for the CWA World Middleweight Championship, but failed, as he lost on the tenth round.Returning to Japan in September 1990, he was the very first opponent for Mutoh's alter-ego, The Great Muta, and also joined Tatsumi Fujinami's Dragon Bombers.In December 1991, Koshinaka and Kuniaki Kobayashi were involved in a violent feud with karatekas Akitoshi Saito and Masashi Aoyagi.