Minamoto no Yoshitomo
Go-Shirakawa and Sutoku were rival sons of Toba. Fujiwara no Tadamichi, first son of regent Fujiwara no Tadazane, sided with Go-Shirakawa while his younger brother Fujiwara no Yorinaga sided with Sutoku. Each rival side in turn beckoned the Minamoto and Taira clans of samurai. Minamoto no Tameyoshi, head of the Minamoto clan, and Taira no Tadamasa, head of the Taira contingent, sided with Sutoku and Yorinaga. Minamoto no Yoshitomo, first son of Minamoto no Tameyoshi, and Taira no Kiyomori, head of the Taira clan and nephew of Taira no Tadamasa, sided with Go-Shirakawa and Tadamichi.