They seem to have been made with various shamanistic purposes, and the earthen figurine in the shape of a pregnant woman, for example, seems to have been made with the purpose of praying for the rich harvest of grain.
さまざまな呪術的意図をもって製作されたものと思われるが、妊娠した女性を表現した土偶などは豊穣祈願の意図をもって作られたものであろう。