Imperial Prince Sadazumi held positions such as governor of Kazusa and Hitachi Provinces, which were shinno ninkoku (provinces whose gubernatorial posts were reserved as sinecures for imperial princes), Nakatsukasa-kyo (Minister of the Ministry of Central Affairs), Hyobukyo (Minister of Hyobusho Ministry of Military), and was awarded the rank of Shoshiinoge (Senior Fourth Rank, Lower Grade).
親王任国とされる上総国や常陸国の太守を歴任したほか、中務卿・兵部卿などを経て正四位下に昇った。