Abstract
The Teshima case, one of the most important illegal industrial dumping incident in Japan, and the Teshima waste disposal project that restore environment by removing and detoxifying harmful substances, achieve establishing relationships between residents and local government with the keyword “co-creation”. In this research, we set the holistic mission of the program to solve the Teshima case, verify the effectiveness of relationship management and platform management that were behind the Teshima case and the Teshima waste disposal project. In addition, we propose a method to support the co- creation platform required for the next project cycle by strengthening the value base of information system using ICT and virtual reality (VR).