Objective: This study examined temporal trends in risk perception and intention to return to Tomioka among residents and evacuees with the aim of aiding community recovery.
Methods: Responses to questionnaires distributed in 2017 and 2021 were compared regarding demographic information, intention to return to Tomioka, desire to consult radiation experts, and risk perception such as anxiety about food consumption, drinking tap water, self-health, and genetic effects. Questionnaires were distributed to all persons registered with the Tomioka town council, both current residents and evacuees.
Results: In 2021, the proportion of responders who had already returned/ wanted to return and those who did not want to return increased by 3.2% and 6.8% respectively, and the proportion unsure about returning decreased by 10.1%. Anxiety for self-health decreased by 15.4%, for genetic effects decreased by 24.4%, for food consumption decreased by 30.9%, and the latter 2 remained significant factors among responders unsure of returning and among those who did not want to return in 2021.
Conclusions: Risk perception for food and genetic effects was significantly associated with uncertainty about returning or not returning. There is a need for continual monitoring of risk perception trends and implementation of targeted risk communication strategies.
Keywords: disasters; evacuation; recovery; risk.