Post-flood social support networks and morbidity in Jôsô City, Japan

Abstract Social supportnetworks are considered beneficial for post-disaster survivor mental health. However, there are family and non-family networks, and support can be received or provided. Therefore, their complex contribution to wellbeing requires analysis. Researching elderly residents of Joso City NE of Tokyo ( N  = 1182 [female: n  = 618], Age M  = 69.76y, SD = 6.10y) who experienced severe flooding in September 2015 investigated data for mental health outcomes of depression (K6), trauma (IES-R), and existence of recent worry from evacuation and house damage. An original instrument tapped support source and direction, controlled to examine mental health symptom changes. House damage was a higher mental health predictor (η p 2  = .10–.16) than evacuation (η p 2  = .033–.093). Results indicated family social supportmay buffer mental health outcomes, but non-family social supportmay burden them. Overall support network size also indicated burdening compared to social supportreceiving-providing imbalance.