Yūki Ōta

is a Japanese foil fencer, gold medallist at the 2006 Asian Games, silver medallist at the 2008 Summer Olympics, team silver medallist at the 2012 Summer Olympics, and individual gold medallist at the 2015 World Fencing Championships. He is a member of the International Olympic Committee (IOC).

Career Yuki took up fencing in his elementary school years at the instigation of his father, a Zorro fan and keen amateur fencer. He won the national junior high school championships. In Heian High School, he got third consecutive championship victories in national high school championships.

Ota climbed his first World Cup podium with a victory at the 2004 Tehran World Cup. He qualified for the 2004 Summer Olympics in Athens, his first Olympic participation, but was defeated in the table of 16 by Russia's Renal Ganeyev. He later explained he had felt completely overpowered: "It was on a whole other level. In F1 terms, it was like the finalists were equipped with completely different engines." In the 2008–09 season, Ota moved to the top of the world rankings after finishing runner-up in the Moscow World Cup.

At the 2012 Summer Olympics, he lost in the third round of the individual foil competition, but won a silver medal in the team foil event. At the 2015 World Fencing Championships, he won gold in the Men's foil event, becoming the first Japanese to win a world championship in any event in fencing.

Ota graduated from Doshisha University. He is a member of the athletes commission of the International Fencing Federation.