The top producer of Square Enix Holdings Co.’s flagship Dragon Quest franchise is stepping down from the role, following delays in developing the next installment of the popular series. Yu Miyake, a director of the board who long oversaw the role-playing franchise, is moving to head up the Tokyo-based company’s smartphone games. Miyake, 56, has been behind numerous Dragon Quest titles since he joined the company in 1992.

This move is part of a large-scale reorganization that took effect on Monday. Square Enix is overhauling its game development pipeline under new President Takashi Kiryu, 48, who’s vowed to reverse flagging sales of both big-budget console games and smaller mobile titles. He told investors in February that the new structure will help the company rely less on external resources and focus more on in-house triple-A games.

Yosuke Saito, 53, who’s best known for his role in developing the hit NieR games, is a strong candidate to take the helm of Dragon Quest production. A Square Enix spokesperson declined to comment.

Since becoming president last year, Kiryu has streamlined game production by shutting down many unannounced projects and placing checks on producers’ influence. The company has promoted a new group of creators, including Naoki Hamaguchi, Tomoya Asano, and Takeshi Nozue, appointing them to executive officers on Monday. The company plans to announce its midterm strategy plan in May.