Kōichi Tanaka (田中康一 Tanaka Kōichi?), who usually goes by as Tanaka (田中さん Tanaka-san?), is a young Japanese business man who is the only regular customer at Neko Rahmen, despite rarely receiving a decent meal. Tanaka plays the straight man to the easily excitable and scheming Taishō. He is extremely diplomatic and polite, but will try to intervene to soothe Taishō when he gets agitated.
