From the standpoint of communicating the risks of future global warming in a clear, unbiased way to the society, we held a dialogue workshop between experts on climate impacts and the media, which was followed by a symposium for the citizens with a real-time survey to enhance two-way interactions. In the workshop with the media, questions regarding climate impacts were raised by the participants and classified. Through the process in which the experts on climate impacts answered to the questions, risks that are keys to effective risk communication were discussed. Based on the results from the media workshop, we designed a two-way symposium for citizens, in which we evaluated how the participants’ impression on global warming changed after listening to lectures. The exposure to lecture materials had a statistically significant impact on their perception of global warming damages, but not on the willingness to take action, while the biased composition of participants, all of whom had been conscious of global warming problem obviously, needs to be retained.
