On the day, seven days prior to the day of boar, each house preparing Inoko mochi cakes for the Imperial Court had invited monks of either Zenpuku-ji Temple of Shingon sect (also called Dondoro Taishi Zenpuku-ji) in Kishiro village or Hossho-ji Temple of Hokke sect in Kirihata village in order to hold an incantation to purify the places, instruments and wells for cooking of Inoko mochi, in advance of commencing their cooking process.
亥の日7日前になると、献上する亥の子餅を作る家には、亥の子餅を調理する場所・道具・使用する井戸を木代村では、真言宗・善福寺（どんどろ大師善福寺）、切畑村は法華宗・法性寺の僧侶を請じて、それぞれ清めの加持を行った後に調理が始まる。