There are these types of human bones with trauma from the Jomon period, however the number of cases clearly increased during the Yayoi period and definitely the battles were more frequent compared to the Jomon period.
このような受傷人骨の例は縄文時代にもないわけではないが、弥生時代には前代と比べて明らかに数が増加しており、縄文時代と比べて戦闘が頻繁に起こったことは確実といえる。