Individual feedback on risk for acquiring SARS-CoV-2 infection failed to change future risk behaviors during the COVID-19 pandemic in Japan

•The effect of receiving personalized risk assessments on changes in preventive behaviors across four analytic samples during the COVID-19 pandemic in Japan.•Individuals who requested and received feedback on their risk of contracting COVID showed significantly higher ORs of transitioning to high risk in February and April 2021.•Individuals who received feedback were more likely to improve to lower risk in July and October 2021.•However, they were less likely to improve to low risk in October 2021 and January 2022.•Feedback of individualized risk assessments was not associated with improvements in individual behavioral risk behaviors during the pandemic.