As Prince Yasuakira's mother was a sister of FUJIWARA no Tokihira and his wife was a daughter of Tokihira, he had a strong connection with Tokihira, thus the rumor spread that the death of Yasuakira and his son were under the direct influence of the evil spirit of SUGAWARA no Michizane who was expelled by Tokihira.
親王は母が藤原時平の妹、妃が娘であった為時平と繋がりが深く、人々は親王と慶頼王の薨去は時平が追いやった菅原道真の祟りとする風評が立った。