The Imperial Court was shocked when news of Masakado's rebellion reached Kyoto and, at the same time, there were also reports of FUJIWARA no Sumitomo's War in Saigoku (the western part of Japan).
将門謀反の報はただちに京にもたらされ、また同時期に西国で藤原純友の乱の報告もあり、朝廷は驚愕した。