When I was in elementary school, there was a small mound of earth in the mountains behind my grandfather's house. I heard from my grandfather since I was a child that there was an ancient burial mound there. When I was in the lower grades of elementary school, I was playing with a friend and digging when I found this. The next day, I took it to school, and the social studies teacher, who was involved in a group studying earthenware, sent it to a research institution for detailed examination. After a few weeks, it was identified as a piece of genuine Jomon pottery. Because it was a small fragment, I was told I could keep it. I would like to sell it to someone interested in pottery or a collector. Instant purchase is welcome. Antique, ancient burial mound, Yayoi pottery, Yayoi period, earthenware