Sakonji is a reasonably tall elderly man with his silver-colored hair. His face has never once been revealed. he is always seen wearing a tengu mask that covers his entire face although Tanjiro states that Sakonji's face is very gentle and calm. He is always seen wearing a cloud-patterned jinbei kimono with navy colored pants which are fastened at his shins by white kyahan guards. He also wears traditional black tabi socks, and sandals, his sandals have blue straps.