The Extra Deck Zone (Japanese: エクストラデッキゾーン Ekusutora Dekki Zōn; usually abbreviated ＥＸデッキゾーン since Code of the Duelist), previously known as the Fusion Deck Zone (融合デッキゾーン Yūgō Dekki Zōn), is where the Extra Deck (previously known as the Fusion Deck) is placed. It is located in the bottom left corner of the playmat.
Game mats often depict the Extra Deck Zone as dark gray, or purple when it was called the Fusion Deck Zone.
↑The frequently used abbreviated form. Simply substitute the furigana with the Latin letters for the full form.