Fukubara Sadatoshi was a Japanese samurai and the 11th head of the Fukubara clan during the Sengoku period. He was a maternal cousin of Mōri Motonari. Following the death of Motonari, Sadatoshi became one of the Goyonin who supported Mōri Terumoto along with Kikkawa Motoharu, Kobayakawa Takakage and Kuchiba Michiyoshi.