Launched in 2020, PLATEAU continues to grow as a platform for the participation of many local governments, private companies, and diverse researchers, engineers, and creators. PLATEAU is a platform for urban management, consolidation of urban functions, and sustainable urban development. The digital transformation of city planning based on PLATEAU will solve social and regional issues. By generating 3D urban models from existing data, we can see the possibilities of cities for the future. As the data is open, the sharing of wisdom and new actions will spread. By integrating and visualizing urban information, transformed into valuable information for the society of the future. The 3D urban model will be the foundation of the coming Society 5.0.