Kagemaru fights with Hagakure-ryu Jujutsu. He was born in the village of Hagakure. "Kagemaru" is the name given to members of the Hagakure clan who work in secret in the shadows of society. His birthright was to become the tenth-generation Kagemaru. His father, the ninth-generation Kagemaru, taught him the fearsome Hagakure fighting technique.

One day, his mother, the eighth-generation Tsukikage, was kidnapped by J6 (judgement6). She was brainwashed and constantly having cybernetic improvements applied, she became a cyborg, immune to feeling. Several years later, the village of Hagakure was attacked by her, now known as Dural. Kagemaru and his father were out fishing, but quickly returned when they saw the blazing village. They were too late, however, and the village was destroyed. Kagemaru's father fell by a bullet from the mystery group and the next morning, Kagemaru salvaged a keepsake from his father, donned his costume, and embarked on a journey to prepare himself to take vengeance on those who spilled his father's blood.

(Source: Virtua Fighter Wikia)