Imperial Prince Tsunesada was aware that his political position was unstable since he was still young, and for this reason, Yoshitada on behalf of the Imperial Prince wrote a statement to decline the offer for Crown Prince status ('Jijo no Hyo') in 838.
恒貞親王は自己の不安定な政治的立場を幼くして自覚しており、承和5年（838年）に善縄は親王に代わって皇太子辞退の書（「辞譲之表」）を執筆している。