A jolly old man, traveler and explorer. During the course of his life he visits a lot of places from which the most talked about in the anime is Egypt. There he discovers the history of the Duel Monsters game and finds out that this game has a long history dating back to Ancient Egypt.
In one of his expeditions, he finds the Millenium Puzzle and gives it to his grandson. In one of his other travels he meets with another explorer like him - Arthur Howkins, who is interested in the history of the Duel Monsters as well. In one of their expeditions together, Sugoroku saves proffesor Howkins' life and receives one of the only 4 Blue-Eyes White Dragon cards in the world, as a gratitude. Sugoroku Muto keeps the card as a symbol of their friendship until the day Seto Kaiba takes it from him.
Sugoroku is an owner of a game store where he lives with his grandson Yugi Muto. His favourite type of cards are puzzles (cards that are strong and have incredible effects only when they are together).
Translated from Bulgarian language by: Ted^Maverick (TV_Squad)