The Daijo-daijin (Grand Minister of the state), who was also Masakado's employer, FUJIWARA no Tadahira, wanted to investigate the situation, so he issued a migyosho (a document of the Shogunate order) and dispatched an envoy to Togoku.
将門の主人の太政大臣藤原忠平が事の実否を調べることにし、御教書を下して使者を東国へ送った。