ShumiStay Japan customers who have been on some of our trips will have encountered various museums and archeological sites associated with the Jomon period 3,000 to 5,000 years ago.
This interesting article indicates that there is a revival in learning and experiencing the Jomon culture.
https://features.japantimes.co.jp/jomon-revival/
Here is a photo of one of our groups outside a recreation of a Jomon house on the Shionomichi Trail.