Kazuo Ogata is the son of Kyoko and Nobuo Ogata, a pair of Tail Soldiers who were sent by the Tailed-People Clan Jashinka Empire to act as spies on the Earth's surface in order to investigate human society; however the duo eventually chose to stay human and live among them without telling the Jashinka of their actions and of their feelings. Ten years following his birth, when the Jashinka forced his parents to use him to kill DynaRed, Hokuto Dan, they were forced to oblige until they rebeled to save his life. After the Dynamen rescued them, they chose to move away in order to keep their peaceful lives, still without revealing the truth to their child for his sake.