Jomon, Jomon People, Ancient Japanese
proper noun
Rope writing was used during the Jomon period, a time in ancient Japanese history when people decorated pottery with rope.
じょうもん
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
縄文時代にもおしゃぶりみたいなものはあったのかな。
I wonder if there was the equivalent of teething rings in the Jomon period.