Several studies have been implemented on home-visit occupational therapy based on activities or occupations for clients with dementia and their caregivers, but all have been conducted abroad; none have taken place in Japan. Therefore, we performed a pilot study of the effectiveness of an occupation-based home-visit program for clients with dementia and their caregivers using single cohort design. The results of our analysis of participants' (n = 9) data indicated that the home-visit program could improve the behavioral and psychological symptoms of dementia, particularly apathy, among clients with dementia, as well as caregivers' needs or what caregivers expected of clients. Additionally, the program tended to decrease caregivers' care burden. The implications of the study are discussed in light of further research on this program.