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Abstract Background Evidence regarding dementia prevention strategies has been accumulating. However, disseminating research findings to the public is often difficult, and addressing the evidence–practice gap presents an important challenge. This study examined potential strategies to support sustained engagement in dementia prevention activities. Participants and Setting Members of senior citizens’ clubs in Tottori Prefecture, Japan. Methods This questionnaire survey collected data on basic demographics, frailty, and subjective cognitive decline (SCD). It also included questions on awareness of the Tottori Method Dementia Prevention Program, interest in experiencing the program if an instructor was dispatched, and the feasibility of engaging in the program through internet-based delivery or printed materials. Results A total of 9,506 respondents were included in the analysis. Awareness of the dementia prevention program was 11.9%. Overall, 50.4% of the respondents registered a desire to try the program if an instructor was dispatched. The highest proportion of respondents (50.5%) reported willingness to engage in the program if materials summarizing activities that could be completed in approximately 10 min were provided. However, both frailty and SCD were associated with a lower interest in these dementia prevention activities (adjusted odd ratio [95% confidence interval] = 0.77 [0.67–0.89] and 0.86 [0.79–0.95], respectively). Conclusions To promote sustained engagement in dementia prevention activities, opportunities to experience the program and activities that can be completed in a short time should be availed. However, disseminating research findings to the public remains challenging, and individuals at a higher risk of health problems may be less interested in dementia prevention. Proactive outreach strategies targeting high-risk individuals may be necessary to effectively disseminate the information. KEY POINTS BOX Key points Disseminating research findings to the public is challenging. To sustain dementia prevention activities, individuals should learn through hands-on experience and the activities should take a short time to complete. Individuals at higher risk of health problems, such as those with frailty or subjective cognitive decline, tend to have lower interest in dementia prevention. Why does this paper matter? This study identified practical approaches for encouraging sustained engagement in dementia prevention activities and highlighted challenges in providing information to the public. The findings provide important insights into designing dementia prevention research programs and disseminating research outcomes to guide social implementation of dementia prevention strategies.