In this study, we explain some characteristics of social media utilized in natural disasters, by examining both the cases where social media was utilized effectively and the cases in which some problems to be solved are found. In particular, we found a problem that the spread of false information results in the spread of fear, and we also found that the utilization of characteristics of social media (handiness, real-time system, personal use) can “connect people” and lead to “mind disaster reduction” which increase the sense of safety of the victims. In addition, including “social media learning” among disaster prevention learning enables children to learn about “senses of safety and anxiety” from the neurophysiological viewpoint. The connecting point between “disaster preventing skills” and “mind disaster reduction” is also pointed out in this study.