Saiko Island is an island located in the northwest of Satellite in the Yu-Gi-Oh! 5D's manga. Uninhabited, the island holds traces of many ancient Duels. The finals of the D1 Grand Prix were held here. Throughout the island, there are 12 Duel Zodiacs, each of which harbor a Star Ticket. The Duel Gate is also located on this island.
- Yu-Gi-Oh! 5D's Ride 26: "Premonition of a Fierce Fight...!!"