Born in the , Ôta attended the before dropping out in 1967. In 1956, nine year old Ôta made his first appearance in Shintoho's ""Niizuma Kagami"". He participate in movies and TV series as a . He also served as the cover model for the magazine. In the 1960s, Ôta left Shintoho and appeared in of Nikkatsu and other companies, and in the 1970s, he focused on historical television dramas. 