The purpose of this study is to re-evaluate regional plans in Okinawa designed by Atelier Zo. By analyzing how the distinctive concepts and methods of a series of regional plans were expressed in the design works of Atelier Zo, we re-evaluate a series of regional plans these works as having produced these outcomes, as well as the value of the design works of Atelier Zo as planning heritages of regional plans, thereby contributing to their preservation and utilization.