Moreover, the fact that a number of kamekan (earthenware jar-coffin) for males excavated at the Yoshinogari site at Saga Prefecture and Kuma/Nishioda site at Chikushi City, Fukuoka Prefecture is double the number of female's, which is interpreted as the males had more occasion to join in battle.
さらに、佐賀県吉野ヶ里遺跡や福岡県筑紫野隈・西小田遺跡などでは、中期前葉の男性甕棺数が女性の倍にも達する事実は男性が戦闘に参加する機会が多いことを示すと考えられる。