Gokiso (御器曽) - A 5 dan professional Go player who insists that a local go festival replace its traditional equipment vendor with another picked by Gokiso. The new vendor sells Shin Kaya boards as Kaya and offers for sale a go board bearing a forged signature claiming to be that of Hon'inbo Shusaku. During teaching games, Gokiso cruelly mauls an amateur player. When the amateur resigns, Sai demands that Hikaru take up the game against Gokiso on condition that the forged board will be removed from the sales display should Gokiso lose the continued game. Sai easily defeats Gokiso.he later play Hikaru in a pro match and Gokiso was now a 7 Dan and Hikaru beaten him