Moreover, as there had been no practice where a child would become emperor ahead of his father while the father was alive, it was required to approve Imperial Prince Otomo as the heir to the imperial throne in order to have Tsuneyo ascend the throne.
更に父親在世中に父を飛ばして子を皇位に立てる慣例が存在しないために、恒世を即位させるために大伴親王にも皇位継承を認めなければならない事態となったのである。