Originally, it was intended to preserve Buddhist scriptures based on Miroku Belief, but it gradually incorporated, from an early stage, motivations such as gokuraku ojo (peaceful death) and spiritual and material benefit gained in this world through observance of the Buddhist teachings.
当初は弥勒信仰にもとづく仏典保存を目的としていたが、やがて極楽往生や現世利益などの動機も早い段階から複合していった。