Wearing masks against 2019 coronavirus (COVID-19) is beneficial in suppressing pandemic spread, not through preventing the wearer from being infected but by preventing the wearer from infecting others. Despite not providing much protection, the custom of wearing masks has prevailed in East Asia from the early stages of the pandemic, especially in Japan, to such an extent that it caused a shortfall in supply. Why do many Japanese people wear masks during the COVID-19 pandemic, even though masks are unlikely to prevent them from getting infected? We examined six possible psychological reasons for wearing masks: three involved expectations about the risk of infection and three involved other driving psychological forces. The results of our nationwide survey revealed that people conformed to societal norms in wearing masks and felt relief from anxiety when wearing masks. However, risk reduction expectations did not affect mask usage. The social psychological motivations successfully explained much about mask usage. Our findings suggest that policymakers responsible for public health should consider social motivations when implementing public strategies to combat the COVID-19 pandemic.

This study investigated the levels of public trust in organizations associated with the Great East Japan Earthquake. In Study 1 (N = 639), the levels of trust in eight organizations as well as the determinants of trust -perceived salient value similarity (SVS), ability, and motivation-were measured twice, first immediately after the earthquake and then a year later. The results indicated that the trust levels for six of the eight organizations had been preserved, supporting the double asymmetric effect of trust. The results of structural equation modeling (SEM) revealed that SVS explained trust more when the organization had been less trusted. Trust in the organization explains well the perceived reduction of the target risk. The results of SEM in Study 2 (N = 1,030) replicated those of Study 1, suggesting the stability of the explanatory power of the determinants of trust. Implications of the study for risk management practices are discussed.

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This brief report documents the results of a survey that measured the public’s and doctors’ perceived effectiveness of preventive behaviors against COVID-19, in Japan. Medical doctors ( n = 117) and the general public ( n = 1086) participated in our online survey. The results of the analysis of mean scores indicate that there were only slight differences in perceived effectiveness between the two groups, while the differences in distributions were remarkable. The results of Silverman’s test suggest the unimodality of doctors’ responses and multimodality of the public’s responses. Implications of the findings to combat the risk of infection are discussed.

Hand washing is one of the most effective measures to reduce the risk of transmitting infectious diseases. However, motivation for regular hand washing during the infectious phase of the SARS-CoV-2 infection remains unclear. We examined four possible reasons for practicing regular hand washing ̶ two involved the perceived effectiveness of this practice in reducing the risk of infection, and the other two involved other motivations. The results of our nationwide survey revealed that people conformed to other peopleʼs practice of washing hands and felt relief from their anxiety when washing their hands. The perceived effectiveness of personal risk reduction, however, showed little effect on the behavior, while motivations such as conformity and relief from anxiety successfully explained a large proportion of hand-washing behavior. Our findings suggest that policymakers responsible for public health should consider social motivations when implementing public strategies to combat the COVID-19 pandemic.