The plot of Hikaru no Go revolves around the Japanese Go world. Several of the manga's prominent characters hold Go titles. The title holder is then called by a combination of their name and the title they hold. In the case of a multiple title holder the most prestigious title they hold is used. The 7 major titles mentioned are Kisei, Meijin, Honinbō, Jūdan, Tengen, Ōza, and Gosei.