Japan's Naohide Yamaguchi won gold and set a new world record in his category for the men's 100 meter breaststroke at the World Para Swimming Championships.
In the final in London on Wednesday, 18-year-old Yamaguchi put in a dynamic performance, making full use of his 1.87-meter-tall frame. He finished with a time of 1 minute 4.95 seconds.
He became the first Japanese swimmer to qualify for next year's Tokyo Paralympics.
Yamaguchi said he trained hard for the race, adding his next target is to win gold in the Paralympics in Tokyo.