Zain Issaka is a defender from Machida, Tokyo. After Toko Gakuen High School and Toin University of Yokohama, he signed with Kawasaki Frontale and was part of the squad that won the 2021 J1 League. A loan to Yokohama FC gave him regular senior football, and he then became a key wide defender for Montedio Yamagata. He moved to JEF United Chiba in 2025 and continued to play as an attacking full-back or wing-back.