Event Format: The competition was a single elimination tournament with a special repechage tournament for the bronze medals. Athletes competed in preliminary rounds, quarterfinals, semifinals and final. The winner of the final was the Olympic Champion and the loser of the final received the silver medal. Quarterfinal losers competed in the repechage tournament for the right to face a semifinal loser for a bronze medal. The winners of the two final repechage matches received bronze medals.
Event facts: Men's Lightweight competition was held at the Nippon Bodukan and 34 athletes participated in the event.