We developed a lifestyle reflection sheet for preventing and treating metabolic syndrome. Our tool aimed to help local residents identify their risk factors for metabolic syndrome, recognize areas for improvement in their lifestyle habits, and proactively engage in health promotion. We enrolled 1,146 patients, consisting of 715 men and 431 women, aged 18 to 92 years. Inclusion criteria were those who underwent health checkups at Mine City Hospital and answered a lifestyle questionnaire. We hypothesized that individuals with conditions related to metabolic syndrome have undesirable lifestyle habits. To test this hypothesis, we conducted logistic regression analysis to examine the probabilities of metabolic syndrome, hypertension, hyperglycemia, and dyslipidemia. The results were displayed as similarity percentages, reflecting how closely the daily behaviors of individuals with these conditions aligned with the behaviors of those who had these specific health issues. Eight specific behaviors were selected for preventing and improving metabolic syndrome: diet-related (eating behaviors that do not lead to obesity, avoid snacking, consume vegetables, reduce salt), physical activity-related (physical activity/ exercise, avoiding prolonged sitting), health-related (maintaining a sense of coherence), and alcohol-related (amount of alcohol consumed). The scores for these factors were calculated using a validated factor analysis. Each item was visualized by displaying a graph showing the standard deviation for all survey subjects. The lifestyle reflection sheet was printed on special paper and returned to individuals after their health check. The sheet served as a reference tool for health guidance. By utilizing this sheet, individuals could be individually notified of their risk of developing metabolic syndrome and the benefits of healthy behaviors. Behavioral changes for health were encouraged through a review of lifestyle habits.