Boxer Kazuki Anaguchi, who underwent brain surgery in December after being knocked down four times in his Japan bantamweight championship bout defeat, died Friday, the Japan Boxing Commission announced.The 23-year-old lost consciousness after the 10-round decision at Tokyo's Ariake Arena on Dec. 26 that saw intense exchanges. He was taken to a hospital.Anaguchi underwent surgery to repair a subdural hematoma, but his situation failed to stabilize. He was pronounced dead at 5:38 p.m. on Friday.Related coverage:Boxing: Teraji retains world titles, Akui becomes new championREAD FULL ARTICLE