Otomo had a son with Koshi called Imperial Prince Tsuneyo, but Heizei ignored the existence of the Otomo father and son and explicitly placed his son, Imperial Prince Takaoka as Crown prince.
大伴にも高志との間に恒世親王が生まれていたが、平城は大伴父子の存在を無視してあえて自分の皇子高岳親王を皇太子に立てた。