In this research, we will create a platform for democracy (hyperdemocracy) on SNS in which software agents and humans participate together. Here, we distribute human agents on SNS, which serves as the basis for consensus building, and mediate the consensus building process (social multi-agent system). We will also support better consensus building and collective decision-making while solving issues such as flare-ups and fake news. (JST-CREST: Research area [Trusted AI system] Fundamental technology that supports trusted AI system 2020 selected project)