Add undisputed champion to Naoya Inoue’s long list of accomplishments.
The Japanese knockout artist stopped reluctant fellow 118-pound titleholder Paul Butler to win all four major belts Tuesday at Ariake Arena in Tokyo, becoming the first bantamweight and first Japanese fighter of any weight to do so.
“It’s been a long journey but … I finally made it. I’ve been able to reach the pinnacle by becoming undisputed champion,” Inoue said through a translator.
Butler (34-3, 15 KOs) didn’t allow Inoue (24-0, 21 KOs) to look spectacular until the final moments, more because he didn’t want to get knocked out than his ability.
The…