The Saga Genji are descendants of Emperor Saga. As Saga had many children, many were bestowed the uji Minamoto, declassing them from imperial succession. Among his sons, Makoto, Tokiwa, and Tōru took the position of Minister of the Left (sadaijin); they were among the most powerful in the Imperial Court in the early Heian period. Some of Tōru's descendants in particular settled the provinces and formed buke. Clans such as the Watanabe, Matsuura, and Kamachi descend from the Saga Genji.
