It is said that MONONOBE no Moriya, who had a faith in deities from ancient times, turned in to a vengeful ghost in the form of Teratsutsuki after he was subdued by Prince Shotoku and SOGA no Umako; Teratsutsuki is said to be trying to cause an obstacle to Buddhism by destroying the temples that were built by Prince Shotoku.
古来よりの神々を信仰していた物部守屋が、聖徳太子と蘇我馬子に討伐された後、寺つつきという怨霊になって、仏法に障りを成すため、太子の建立した寺を破壊しようとしているのだとされる。