A game shop proprietor and expert gamer all around. Sugoroku is Yugi's grandfather. Not  much is really known about Yugi's parents, but we're shown that he is raising Yugi. Sugoroku owns the game shop below where they live. Yugi gets most of his games and other items from there. Sugoroku has his own mystery behind him. He's been to America and has several friends there. He has connections to Egyptian artifacts, mostly games, and he has friends in the universities in Japan and other places. We don't know what else Sugoroku has or where he's been or even what else he's gotten in his travels. Sugoroku is a great player of Duel Monsters. He has a special card, the "Blue Eyes White Dragon". It's said that it can only be used by the person who's heart it belongs to. Seto Kaiba tried to steal it from Yugi, and was successful in his attempt. In the end however, the heart of the card was for Yugi's grandfather and Kaiba couldn't use it. Sugoroku cares a great deal about Yugi, perhaps that's why he gave Yugi the "Millennium Puzzle". He knew what secrets it held, and perhaps he wanted Yugi to become stronger. But strength comes at a price. A former world traveler, Yugi's grandpa now owns the neighborhood gaming shop. Sugoroku knows everything there is to know about games, but is especially well-versed in the ways of Duel Monsters. Sugoroku teaches Yugi about believing in the "heart of the cards."