According to the legend handed down at Inaba-jinja Shrine in Gifu City, Gifu Prefecture, Inishikiiribiko no mikoto, once dominated Oshu Province on the Imperial edict, however, as Governor of Mutsu Province, Toyomasu, who accompanied him to Oshu, became jealous of Inishikiiribiko no mikoto's success and informed the Imperial court of a false charge that Inishikiiribiko no mikoto was plotting a treason, and thus, Inishikiiribiko no mikoto was accused as an Imperial enemy and attacked to death there.
岐阜県岐阜市にある「伊奈波神社」に伝わる伝承によると、五十瓊敷入彦命は朝廷の詔を承けて奥州を平定したが、一緒に同行した陸奥守豊益が五十瓊敷入彦命の成功を妬んで、命に謀反の心ありと讒奏したため、朝敵として攻められてこの地で討たれた。