Emperor Ojin, who remembered the boar that had saved him from danger when he was a prince, issued an imperial edict to make it a festive custom for the people of Kishiro, Kirihata and Omaru villages in Nose district to present kugo (emperor's meal) on the day of boar in October every year, which is now believed to be the origin of the custom to present Inoko mochi cakes of Nose district to Imperial court.
応神天皇は、皇太子の時に、猪に危難を救われた事を思い出して、吉例として、詔を発して、能勢・木代村、切畑村、大円村より、毎年10月の亥の日に供御を行うように命じ、亥の子餅の献上の起源であると言い伝えらえれている。