Tanaka is a man of average height, standing about as tall as Luffy, with a disproportionately large head and disproportionately smaller legs. He wears a black suit with a green bow tie as well as a white stripe on the left side. A black and white hood covers two horn-shaped appendages on his head, and there is a green star on the hood.

Being responsible for security on Gran Tesoro, Mr. Tanaka is trusted by Gildo Tesoro to keep the ship safe.