Kiyomori demanded to make the imperial prince as the crown prince to the cloistered emperor, and Shinno senji (a letter of the order of the emperor which demanded the inauguration of crown prince) was carried out to name the imperial prince as Emperor Antoku (Tokihito) on January 14 (December 9 in old lunar calendar), and he was formally installed as the Crown Prince on January 20 (December 15 in old lunar calendar).
清盛は皇子を皇太子にすることを法皇に迫り12月9日、親王宣旨が下されて安徳天皇（ときひと）と命名され、15日、立太子した。