The philosophy which had been for ancestor worship and nature worship, began to cover livestock and properties (tools used in daily life), and in order to save on things, the idea of divine spirits such as Tsukumogami (the divine spirit that resides in old tools or creatures) was developed, which was inherited down to the Edo period.
それまでは、自然崇拝や祖霊崇拝であった観念が、家畜や器物（生活の道具）にまで及び、「もの」を粗末にしないようにとの思いから、九十九神などの神霊の観念が生まれ、江戸時代まで引き継がれた。