Heiji Rebellion
Yoshitomo fathered five sons in total. His two sons, Yoshihira and Tomonaga, lost their lives following the Minamoto Clan's defeat in the Heiji Rebellion in 1160. At the time of the outbreak of the Genpei War in 1180, Minamoto no Yoritomo was his eldest surviving son. His other two surviving sons were Minamoto no Noriyori and Minamoto no Yoshitsune.