His promotion and other details suggested that he was not happy with his granted official rank, he possibly got himself involved in Nagayao no hen (Conspiracy of Nagayao) with other officials at the ranks of Gaii.
その昇進の経緯などから、叙位に対する不満から他の外位任官者と共に長屋王の変に関わった可能性が指摘されている。