The reasons were that he seized sento ryo Yokota no sho, which was Emperor Goenyu's Imperial property within Mitsuyuki's territory of Izumo Province, and that he did not follow the migyosho (document of shogunate order).
満幸の分国出雲国において後円融天皇の御料である仙洞領横田庄を押領して、御教書にも従わなかったとの理由であった。