In april, 756, when Shomu Daijo Tenno (the retired Emperor) was sick, Matanari took gold to Kyoto from Mutsu, he was approched by Naramaro to be part of the rebellion for the third time.
天平勝宝8歳（756年）4月、聖武太上天皇不予の際黄金を納めるため陸奥より上京した全成は奈良麻呂から三度目の謀反計画を謀られた。