ANKARA Two Japanese boxers have died from brain injuries sustained in separate bouts during the same event in Tokyo, the World Boxing Organization (WBO) and local media reported. Shigetoshi Kotari, 28, lost consciousness shortly after a 12-round draw against Oriental and Pacific Boxing Federation junior lightweight champion Yamato Hata on Aug. 2. He underwent emergency brain surgery but died later the same day. Hiromasa Urakawa, also 28, died Saturday from injuries suffered when he was knocked