Although Jirō is always seen napping, one should not be fooled by his appearance. At the Tokyo Prefectural Tournament, he defeated Fuji Yūta in less than 15 minutes. Jirō only perks up when he is playing against a challenging opponent. So far this has happened a few times, including matches with Atobe Keigo, Marui Bunta and Fuji Shūsuke. He is regularly awakened by Kabaji under Atobe's orders since he sleeps moments before his own match.