Eiji hails from Shingetsu Village, one of the many places where Shishio's reign of terror had taken over. Senkaku was put in charge of the small, peaceful village. His word was law, and whoever disobeyed him or tried to escape were punished severly, usually with death. Eiichiro, Eiji's older brother, had tried to save his younger brother, but was beaten to death for trying. Eiji was found in his brother's dying arms by Kenshin and Misao. All on the young boy's mind was revenge on Senkaku, the man who killed both his parents and brother. When Kenshin had defeated Senkaku in battle, Eiji was about to take vengeance with Eiichiro's sword, but the rurouni had stopped him to remind him that his brother's sword was not a weapon for killing, but for protecting. Since the incident, Eiji was relocated from his home to be taken care of by Saitou's wife, Tokio, and was unheard of after that.