Ichiro is Chief Tanaka's nephew, who recently joined the local police force. He first appears driving his uncle to the first cyborg crime scene, and he later watched over Sachiko after the Tony Glek attack. At her request, and knowing the risks, Ichiro drove Sachiko to Hazama's apartment. On the way, a car rammed them from behind. Ichiro looked behind them and saw a bunch of punks in the car, ready for action. He would later see them in the gang fight, the same place where 8-Man first re-appeared. He and Sam reported this to Tanaka when he arrived, but Tanaka didn't believe it.
Ichiro is a a rather typical cop with a few rookie problems to deal with, such as keeping his eye on the road.