Instinctive anxiety or fear when faced with unfamiliar risks is only natural, and it is perhaps inevitable that theoretical explanations do not get the message across. One factor contributing to this is the discrepancy between the risk perception of the public and the risk assessments of experts, who hitherto thought that providing scientifically accurate knowledge and information was sufficient to ensure full awareness. In light of this situation, risk communication needs to be based on mutual trust between the person delivering the message and those receiving it.