Strangely enough, archaeologists have yet to turn up any evidence of battles or wars. Ten thousand years is of course a long time for uninterrupted peace but most experts believe that on the whole the Jomon people were hunter-gathering tribes because:
1. There have been no signs of walled settlements, defences, ditches or moats.
2. No finds of unusually large numbers of weapons such as lances, spears, bows and arrows.
3. They have found no evidence of human sacrifice nor masses of unceremonially dumped bodies.
Nevertheless, there is evidence that from time to time disputes broke out or acts of aggression occurred, beginning as early as the Initial Jomon period where remains of a male individual with a hip bone perforated by a bone point Kamikuroiwa Site has been found. Arrowheads were found in the bones and broken crania. There are many examples in the Final Jomon Period.