Ikki Tousen (一騎当千 Ikkitōsen, lit. "Strength of a Thousand"), known in North America as Battle Vixens, is a manga series written and illustrated by Yuji Shiozaki, based on the classic Chinese novel Romance of the Three Kingdoms. The series revolves around an all-out turf war in the Kanto region of Japan where fighters known as Tōshi (闘士, meaning "fighting soldier") from seven schools battle for supremacy. The story centers on Hakufu Sonsaku, a fighter who transfers to Nanyo Academy, one of the seven schools involved in the turf war.