Minamoto no Yoshitomo
The Seiwa Genji's fortunes declined in the Hōgen Rebellion (1156), when the Taira executed much of the line, including Minamoto no Tameyoshi. During the Heiji Disturbance (1160), the head of the Seiwa Genji, Minamoto no Yoshitomo, died in battle. Taira no Kiyomori seized power in Kyoto by forging an alliance with the retired emperors Go-Shirakawa and Toba and infiltrating the "kuge". He sent Minamoto no Yoritomo (1147–1199), the third son of Minamoto no Yoshimoto of the Seiwa Genji, into exile. In 1180, during the Genpei War, Yoritomo mounted a full-scale rebellion against the Taira rule, culminating in the destruction of the Taira and the subjugation of eastern Japan within five years. In 1192 he received the title "shōgun" and set up the first "bakufu" at Kamakura.