The following field report is based on lessons learned from the adaptation and utilisation of the Psychological First Aid for Child Practitioners (Save the Children, 2013) materials in Japan. Psychological first aid (PFA) is a set of skills and competencies that help reduce the initial distress of children and caregivers due to accidents, natural disasters, conflicts or other critical incidents. The manual was developed by Save the Children based on Psychological First Aid: A Guide for Field Workers (World Health Organization, War Trauma Foundation and World Vision International, 2011).