Fujio presumes that the nuts from deciduous trees such as acorns and the chestnuts were harvested during a relatively brief period of time in autumn; therefore, a consolidated labor by a fairly large settlement was necessary and the Jomon people used the earthen figures to conduct religious services in order to promote solidarity in the society.
落葉性堅果類、いわゆるドングリや栗は秋の一時期に集中的に収穫される為、比較的大きな集落による労働集約的な作業が必要となる為、土偶を用いた祭祀を行うことで社会集団を統合していたのではないかという考え方である。