Over the past ten years, we have been conducting a series of co-design workshops in various towns and cities in Japan. There, we create posters based on our ethnographic observations and interviews during the fieldwork. Posters, as media, promote our reflections upon our day-to-day activities, and facilitate our communication. The present project proposes a framework to understand the roles of researchers, as outsiders, to stimulate and revitalize local community members in order to enrich their understandings and practices of community development. We suggest that outsiders can play an important role to reexamine and rediscover the various assets within the community, and thereby contribute to provide with ideas to the local community from the outside-in.