From 2004 to 2007, Kawazu served as one of Square Enix's board of directors alongside Yoichi Wada and Yosuke Matsuda. He was the only game developer on the board, and returned to development following his resignation. During this time, Kawazu acted as executive producer for both the "Ivalice Alliance", a series of titles set within the fictional world of Ivalice; and "Final Fantasy Crystal Chronicles", a subseries he created through the partially-owned shell company The Game Developer Studio, acting as producer for the first game and executive producer for subsequent entries. For the fifth entry "", he acted as a producer and writer. He would take over as executive producer of "Final Fantasy XII" in 2005 release after Yasumi Matsuno withdrew from the project due to poor health. He played a key creative role in "The Last Remnant", a standalone RPG designed by veterans of the "SaGa" series. He also acted as concept creator for "It's New Frontier", a life simulator for mobile devices which ran from 2009 to the close of Square Enix's old mobile services in 2018.