Yui Ohashi has given Japan its first swimming gold medal at the Tokyo Aquatics Centre.
With a dazzling breaststroke leg, Ohashi romped to victory in the women's 400-meter individual medley, touching first in 4 minutes, 32.08 seconds.
Her performance made up for the disappointment of the previous night, when gold-medal favorite Daiya Seto didn't advance to the final of the men's 400 individual medley.
The United States continued to pile up medals, with Emma Weyant taking silver and Hali Flickinger the bronze. The Americans have earned five of a possible nine medals from the first three swimming finals, including a gold by Chase Kalisz in the men's 400 individual medley.