Hajime Itoi (糸井 統, Itoi Hajime) (born June 22, 1971, in Gifu) is a retired Olympic backstroke swimmer from Japan.

He represented his native country at two consecutive Summer Olympics, starting in 1992.

He is best known for winning a silver medal at the 1995 Summer Universiade in Fukuoka.

He competed for the Waseda University.

This Japanese swimming biography is a stub.