Japanese swimmer Yamaguchi Naohide has broken his own world record to win the gold medal in the men's 100-meter breaststroke in the category for athletes with an intellectual impairment.
Yamaguchi pulled off the feat on Sunday in his Paralympic debut.
The 20-year-old advanced to the final of the SB14 class after marking the fastest time among the competitors in the preliminary round.
By making full use of his 1.87-meter height and foot size of 30 centimeters, Yamaguchi won the race with a record time of 1 minute, 3.77 seconds.
That's 0.23 seconds faster than the world record he had set in May.
Australia's Jake Michel won the silver medal and Scott Quin of Britain won bronze.