<p>This report outlined psychological support activities and psychological studies related to the Great East Japan Earthquake. After the disaster, psychological support programs were funded by the Japan Society of Certified Clinical Psychologist, Tohoku University and by other organizations to assist and care for the victims of this Critical Incident Stress. Studies have been conducted on the support systems at disaster areas and research on the mental health of disaster victims. In addition, there have been studies on the critical incident stress of those treating the victims and information behavior after the earthquake with regard to rumor damage and risk perception. The sharing of this knowledge was proposed to allow for better preparedness for the next disaster.</p>