Tachibana clan (kuge)
The name of "Tachibana" was bestowed on Agata-no-Inukai no Michiyo by Empress Genmei in 708. She was the wife of Prince Minu, a descendant of Emperor Bidatsu and mothered Princes Katsuragi and Sai. She later married Fujiwara no Fuhito and bore Kōmyōshi (Empress Kōmyō). In 736, Princes Katsuragi and Sai were given the surname "Tachibana", renouncing their imperial family membership. They became Tachibana no Moroe and Tachibana no Sai respectively. Over the course of the Heian period, they engaged in countless struggles with the Fujiwara family for domination of court politics, and thus essentially for  control of the nation; on a number of occasions this developed into outright violent conflict. One of these conflicts was the uprising of Fujiwara no Sumitomo in 939–941. Though the rebellion was ultimately suppressed, the Tachibana family was scattered in the process, and lost much of its power. Another branch family developed in Iyo Province, becoming known as the Iyo Tachibana family. Tachibana Tōyasu, who executed Fujiwara no Sumitomo, was the progenitor of this branch; Kusunoki Masashige, a celebrated pro-Imperial commander of the 14th century, claimed descent from Tōyasu.