Many individuals who were affected by the Great East Japan earthquake and tsunami and the subsequent Fukushima Daiichi Nuclear Power Plant accident continue to face a challenging recovery. We reviewed the long-term mental health consequences of three major nuclear power plant accidents: the Three Mile Island (TMI, 1979), Chernobyl (1986), and Fukushima (2011) nuclear disasters. We examined the relevant prospective cohort studies and before-and-after studies that covered more than two timepoints, searching four databases (PubMed, Ichushi, PsyArticles, and PTSDPub). We identified a total of 35 studies: TMI, n = 11; Chernobyl, n = 6; and Fukushima, n = 18. The smaller numbers of early-phase studies (within 6 months) of the Chernobyl and Fukushima disasters may also indicate the chaotic situation at those timepoints, as large-scale interviews were conducted in the early phase after the TMI disaster. Although the patterns of effects on mental health outcomes were diverse, more than half of the participants in the studies we evaluated were categorized into low or under-threshold symptom groups in all three disasters. Across the three disasters, the radiation exposure level estimated by the proximity and stigma were the common risk factors for mental health outcomes. Our findings will contribute to a comprehensive understanding of the impact of the worst nuclear accidents in history on the affected individuals’ mental health, and our results illustrate the longitudinal consequences of such disasters.

The COVID-19 pandemic has caused Japanese workers psychological distress through crises of health, economics, and social relationships. To assess whether these effects are amplified by the gender bias that exists in Japan, we examined male and female worker’s psychological distress and difficulties during the pandemic. An online “COVID-19-related difficulties” questionnaire, based on item response theory, gathered responses from 3464 workers in October and November 2020. The workers’ psychological distress was found concerned to be significantly worse than before the pandemic. Basic stressors related to infection anxiety, economic anxiety, and restrictions on social interactions and outings. Men’s and women’s experiences of difficulties were consistent with traditional gender roles in Japan: men were more likely to face job-related stressors, such as economic insecurity and work-style changes; women were more likely to face non-job-related stressors, such as increased living costs and reduced social interactions. Policymakers and employers should consider the association between gender differences and industry types, and implement measures to strengthen the acceptability of mental health care.

Although adult patients with attention-deficit hyperactivity disorder (ADHD) and autism spectrum disorder (ASD) often have sleep problems, few studies have verified the effect of a psychological approach specific to sleep–wake rhythms on these sleep disturbances. Therefore, the aim of this pilot study was to develop a trans-diagnostic approach with sleep scheduling and regularity of sleep duration as core modules, and to examine the effect of the intervention in adult ADHD and/or ASD subjects with sleep disturbances. This was a within-group pilot study. Ten patients with adult ADHD and/or ASD with sleep disturbances (10 males, age: 27.4 ± 5.6 years) took part in a 90-min weekly group intervention for 5 weeks. All participants were assessed on scales for sleep complaints, anxiety, depression, and symptoms of ADHD and ASD before and after the intervention, and at 3-month follow-up. The results showed that the intervention significantly improved sleep disturbances at post-intervention (p = 0.003, d = 1.30, 95% CI 0.31–2.28) and at the 3-month follow-up (p = 0.035, d = 0.41, 95% CI − 0.48 to 1.30). In addition, attention switching for ASD symptoms was significantly reduced post-intervention (p = 0.031, d = 1.16, 95% CI 0.19–2.13). This is the first pilot study of a trans-diagnostic group approach for adult ADHD and/or ASD with sleep disturbances. The intervention primarily led to an improvement of sleep disturbances, followed by improvement of disease-specific symptoms in adult subjects with ADHD and ASD.

The coronavirus disease 2019 (COVID-19) has significantly affected the mental health of healthcare workers (HCWs). The authors have provided psychosocial support to HCWs working in typical hospitals and nursing homes in Fukushima Prefecture, Japan, where major COVID-19 outbreaks have occurred since December 2020. This study retrospectively examines depressive symptoms before psychosocial interventions among HCWs working at typical hospitals and nursing homes experiencing in-house major COVID-19 outbreaks. We have offered psychosocial support in eight hospitals and nursing homes, obtaining data on the mental health status of 558 HCWs using the Patient Health Questionnaire-9. The study’s results indicate that 29.4% of HCWs have exhibited moderate or higher depressive symptoms, and 10.2% had suicidal ideation. Multiple logistic regression analysis showed that being a nurse was associated with higher depressive symptoms and suicidal ideation compared to other HCWs. In addition, multiple logistic regression analysis of Polymerase Chain Reaction-positive HCWs showed that being a nurse and the number of COVID-19-related symptoms was associated with high depressive symptoms. These results suggest that HCWs in typical hospitals and nursing homes experiencing major COVID-19 outbreaks are more likely to exhibit severe depressive symptoms, which may worsen if infected with COVID-19. This study’s findings expand the current understanding of HCWs’ depressive symptoms and the importance of psychosocial support during unexpected major outbreaks in healthcare facilities.

Here we present the Japanese version of the COVID Stress Scale (Taylor et al., 2020).