Japanese boxing superstar Naoya Inoue proved on Tuesday night that he is a force to be reckoned with after defeating American boxer Stephen Fulton. Key details: The stunning win occurred at Tokyo's Ariaka Arena when Inoue, 30, secured his 25th consecutive win and 22nd knockout by defeating Fulton, 29, in the eighth round via a technical knockout. Inoue won the WBC and WBO junior featherweight titles in the process, making him a four-division world champion.