In Japanese mythology, it is said that the souls of children who die before their parents are unable to cross the mythical Sanzu River on their way to the afterlife because they have not had the chance to accumulate enough good deeds and because they have made the parents suffer. It is believed that Jizō saves these souls from having to pile stones eternally on the bank of the river as penance, by hiding them from demons in his robe, and letting them hear mantras

