Citizen science, in which citizens and scientists collaborate to generate and utilize data and knowledge, is an important approach to co-creating society. While citizen science in the natural sciences is well established, it is still in its infancy in the humanities and social sciences. To use the citizens‘ knowledge to solve social problems it is necessary to design protocols for citizen participation, to involve universities in supporting citizen science, and to build data provision and management systems that take into account data ownership and privacy protection. At a conference co-organized by the NIRA Research Institute, the DWIH Tokyo, and the DIJ, researchers from Japan and abroad discussed the possibilities of citizen science to contribute to the development of research in the humanities and social sciences. DIJ director Franz Waldenberger contributed the closing comments. The opinion paper ‚Citizen Science in the Digital Age‘ based on this conference has now been published (in Japanese). A PDF version is available for download here