It was during Kiyomori's December 1159 pilgrimage to Kumano, in which Munemori was travelling as a member, that the Heiji no ran War (turmoil of the Heiji war) broke out.
平治元年（1159年）12月、宗盛は清盛の熊野参詣に同行していたが、その途上で平治の乱が勃発する。