By observing the relics excavated from the remains, it is assumed that chestnut trees were used predominantly for building materials and fuel in the Jomon period; it is also certain that chestnut forests surrounded the settlements during the Jomon period.
縄文時代の建築材や燃料材はクリが大半であることは遺跡出土の遺物から分かり、縄文時代の集落の周辺にクリ林が広がっていたことも確かである。