However, according to a collection of Chinese poetry "Kaifuso" (Fond Recollections of Poetry), and "Manyoshu" (Collection of Ten Thousand Leaves), 'his father, Emperor Tenchi, decided that Prince Otomo ought to be the formal Crown Prince.'
しかし漢詩集『懐風藻』や『万葉集』には「父・天智が大友皇子を立太子（正式な皇太子と定めること）していた」とある。