[SUMMARY] This research aims to explore factors about older people with dementia impacting their ability to continue living alone at home. Semi-structured interviews were held with 11 care managers in charge of older people with dementia continuing to live alone at home. Inductive, qualitative analysis was conducted on the data obtained using the International Classification of Functioning, Disability and Health (ICF) as the analytic framework. However, environmental factors were excluded since the aim was to explore factors about the older people with dementia themselves. Analysis resulted in eliciting the following themes as factors impacting the ability of older people with dementia to continue living alone at home. Two themes for health conditions include “whether dementia diagnosis and confirmation exists.” Four themes for body functions/body structures include “functions maintained through utilization of nursing care products.” Five themes for activity include the “ability to convey intentions and communicate.” Three themes for participation include “continued involvement with community residents and family,” and three themes for personal factors include “an unchanged sense of values understood from the individual’s interests, preferences, and personal relationships.” Older people with dementia were able to continue living alone at home by demonstrating their own strengths in reinforcing factors within day-to-day life. Even when function declines due to hospitalization or temporary changes in health, returning to a familiar home environment and receiving appropriate support, such as utilization of assistive products, led to maintaining functions and recovery. This study suggests the importance of using the ICF perspective to organize information on functions in everyday life that affect each other.