Yu Hirayama (平山 優, Hirayama Yū, born 25 July 1985) is a Japanese badminton player. She was born in Shiogama city, in Miyagi prefecture, and graduated from St. Ursula High School. She is now a sophomore at the School of Social Sciences. She won the first prize of the inter-high school athletic meet when she was a second grade high school student, and the next year, she won the all-Japan second prize. She joined the Unisys badminton team in 2008, and was part of the Japanese team which played in the World Ladies' Championship (Uber Cup) and other worldwide tournaments.