The General Incorporated Association Maebashi Design Commission, QON Inc., and FORUM8 Co., Ltd. will jointly implement the participatory town development digital twin project "MAEP," where dialogue continuously updates the vision of the future city. This project, set in Maebashi City, aims to realize co-creation of a future city through citizen participation by collecting and analyzing dialogue from diverse stakeholders such as citizens, businesses, and visitors, and visualizing the results on a 3D city model. It is developed as a PLATEAU 3D city model use case and has been adopted by the Ministry of Land, Infrastructure, Transport and Tourism's "Fiscal Year 2026 Support Project for Building Digital Infrastructure for Urban Spatial Information." In this project, the three organizations, each with their own expertise, will collaborate to create a circular town development platform that continuously reflects citizens' voices in the future city model. Maebashi Design Commission will be responsible for operating the participatory platform "MAEP (Maebashi ENGAWA Platform)," facilitating dialogue with citizens, community building, and designing inquiries related to town development. QON will leverage its expertise in online community management to analyze dialogue and behavioral logs, visualize values, and structure data for use with generative AI. FORUM8 will utilize the PLATEAU 3D city model and VR/digital twin technologies to build the future city simulation environment "MAEBASHI2099," and develop visualization and immersive interactive systems. Project Overview and Demonstration Experiments In traditional town development, future visions were typically drawn by the administration and a small number of experts, with citizens providing opinions through methods like public comments. However, this approach had limitations, as only a very limited number of people could participate. This project will shape the future of the city based on the opinions and discussions of tens