Yui Ohashi (Japanese: 大橋 悠依, Hepburn: Ōhashi Yui, born 18 October 1995) is a retired Japanese swimmer, specializing in the medley events.

She became the first Japanese woman to dip beneath the 2:08-barrier in the women's 200 metre individual medley event at the 2017 World Aquatics Championships, finishing with a silver-medal time and a national record of 2:07.91.

[1][2][3][4] Ohashi qualified to represent Japan at the 2020 Summer Olympics.

[5] She won Japan's second gold in the 2020 Summer Olympics, winning the Women's 400m individual medley.

She also won the gold medal in the Women's 200m individual medley.