In 743, Naramaro leaked his conspiracy, which was planned with ONO no Azumahito, of enthroning Prince Kibumi as the next emperor to SAEKI no Matanari after Emperor Shomu became ill during the imperial visit to Nanba.
天平15年(743年)、難波行幸中の聖武天皇が病に倒れた時、奈良麻呂は佐伯全成に対し小野東人らと謀り次期天皇に黄文王を擁立する旨の計画を漏らす。