In March 1180, Kiyomori forced Emperor Takakura to abdicate the throne and enthroned a three-year-old son born between Emperor Takakura and Kiyomori's daughter TAIRA no Tokuko as Emperor Antoku.
翌治承4年（1180年）2月、清盛は高倉天皇を譲位させ、高倉と清盛の娘平徳子との間に生まれた3歳の安徳天皇を即位させた。