Kakuzu is a very tall (easily standing as the second tallest member of Akatsuki), tan-skinned man with long dark-brown hair. His eyes had an unusual colouring: green irises, no pupils and red sclerae. Noticeably, despite his advanced age, he still appeared as a man well within his prime, retaining a very muscular build. Stitches cover his body especially his mouth. Long black hair often tucked beneath a hood and has four masks in his back which are four of his hearts.