"Yamato Katsuragi Hozan-ki", the Shinto book of Shugendo (Japanese ascetic and shamanistic practice in mountainous sites), explains that Amenonuboko is a mystical object generated at the time of tenchi-kaibyaku (creation of heaven and earth), which is an incarnation of Bonten (Brahma, a major Hindu deity thought to be responsible for creating the world), and that it is regarded as a vajra which has a power to smash the evil and has another name Amanomagaeshi no hoko.
修験道の神道書『大和葛城宝山記』では、天沼矛を天地開闢(日本神話)の際に発生した霊物であり梵天を化生したとし、金剛杵と見なされ魔を打ち返す働きを持つとして別名を天魔反戈というとされている。