He was approached by TACHIBANA no Hayaari about the Crown Prince, Imperial Prince Tsunesada, however, Imperial Prince Abo did not take it seriously, and sent a secret document about this to Hayanari's cousin, the Empress Dowager TACHIBANA no Kachiko for her to make a decision. (the Showa Incident)
ついに橘逸勢らから東宮恒貞親王の身上について策謀をもちかけられるが、阿保親王は与せずに、これを逸勢の従姉妹でもあった皇太后橘嘉智子に密書にて報告、判断を委ねた（承和の変）。