 He was succeeded by his 17-year-old son Minamoto no Yoriie under the regency of his maternal grandfather Hōjō Tokimasa.A long and bitter fight ensued in which entire clans like the Hatakeyama, the Hiki, and the Wada were wiped out by the Hōjō who wished to get rid of Yoritomo's supporters and consolidate their power.Yoriie did become head of the Minamoto clan and was regularly appointed "shōgun" in 1202 but by that time, real power had already fallen into the hands of the Hōjō clan.