In 846, he challenged Sadaiben (Major Executive Officer of the Left) Masamio on the principle of law at the time of the Case of Priest Zengai and brought down five of his co-worker benkan, including Masamio.
846年、僧善愷（ぜんがい）の裁判事件でと法理を争い、左大弁正躬王（まさみおう）ら同僚の5人の弁官全員を失脚させる。