Gishiwajinden (literally, an 'Account of the Wa' in "The History of the Wei Dynasty") describes that there were conflicts between various districts before Himiko ruled the Yamatai-Koku kingdom.
魏志倭人伝には、卑弥呼が邪馬台国を治める以前は、諸国が対立し互いに攻め合っていたという記述がある。