The purpose of this study is to re-evaluate regional plans in Okinawa designed by Atelier Zo. By comparing the plans of the three regions, Onna, Nago and Nakijin, with each other, it becomes clear that these plans have characteristic concepts and methods. By verificating the process of establishing these plans, it will be clarified that human connection was a major factor in establishing them. From these verifications, we gain a perspective for future regional planning and assessing heritage of a series of plans.