The grandfather of Yugi Muto, who gave him his famous Millennium Puzzle as a present, which he had recovered from the tomb of Pharaoh Atem in his youth. He was once a gaming master who traveled all over the world to try all sorts of games and win them all, vowing that if he ever lost a game, he'd "open up a game shop, wear overalls, and collect years instead of chips". In the present, he's an overall-wearing old man who owns a game shop called Kame Game, where Yugi and his friends get several of the games they play. In the second series anime adaptation, he taught Katsuya Jonouchi how to play the Duel Monsters card game. Similar to his grandson, his fondness for games is evident even in his name: "Sugoroku" is a Japanese game similar to Backgammon. Sugoroku is the reincarnation of Ancient Egyptian vizier, Siamun Muran, right-hand man to the Pharaoh Atem.