Introduction: This study examined the effectiveness of the modified Hospital Elder Life Program (HELP) for preventing delirium, which was adjusted to be used in acute internal medicine wards at general community hospitals in Japan.Methods: The pre-intervention group consisted of 751 patients aged 70 years or older hospitalized at Nishiyodo Hospital and Amagasaki Medical Co-op Hospital between January and July 2013. The post-intervention group consisted of 775 patients aged 70 years or older hospitalized between March and July 2017 and between October and December 2017. To address risk factors for delirium, a multicomponent intervention (modified HELP) consisting of the following was implemented: handing out pamphlets, orientation to maintain activity levels, sleep improvement, early initiation of rehabilitation, provision of glasses, hearing aids, and dentures, and the termination of continuous intravenous infusion. The Delirium Screening Tool was used to calculate the percentage of inpatients who developed delirium.Results: Of the 751 patients in the pre-intervention group, 108 (14.4%) developed delirium and 88 (11.4%) of the 775 patients in the post-intervention group exhibited delirium (odds ratio: 0.70; 95% confidence interval: 0.48-1.01; p=0.06).Conclusion: The modified HELP, adjusted for use in Japan, did not significantly reduce the rate of delirium during hospitalization. Therefore, a more universal intervention method is needed in the future.