Toshiko Shirasu-Aihara (白須-相原 俊子, born June 3, 1939) is a retired Japanese gymnast. She competed in all artistic gymnastics events at the 1960 and 1964 Olympics and won a team bronze medal in 1964. Her best individual achievements were fourth places on the vault and uneven bars in 1964. Born Toshiko Shirasu she changed her last name after marrying Nobuyuki Aihara, a fellow Olympic gymnast. Their son Yutaka Aihara won a bronze medal in gymnastics at the 1992 Olympics.