In February 1180 Kiyomori took political power, he made Emperor Takakura abdicate and allowed Imperial Prince Tokihito who was three years old to succeed to the throne (Emperor Antoku).
翌治承4年（1180年）2月、政権を掌握した清盛は高倉天皇を退位させて、3歳の言仁親王を即位させた（安徳天皇）。