The association between exposure to hate speech or perceived discrimination and mental health problems among Korean residents in Japan.

This study evaluated the effect of perceived discrimination and racism on the mental health state of Korean residents in Japan, with a particular focus on the risk of post-traumatic stress disorder (PTSD), depression, and psychological distress. Surveys were sent to Korean residents in Japan and a total of 240 valid responses were received. The valid response rate was 27.1%. The participants answered several questionnaire items, including demographic information and questions pertaining to their experiences of perceived discrimination, along with three self-reported measures of mental health, i.e., the Japanese version of Impact of Event Scale-Revised, the Zung Self-rating Depression Scale (SDS), and the 12-item General Health Questionnaire (GHQ-12). The results indicated that Korean residents in Japan experience hate speech and discrimination with a markedly high frequency (92.9% and 100%, respectively), and that factors such as employment discrimination and exposure to hate speech via social networking services were significant predictors of probable PTSD and psychological distress.