We aim to clarify the requirements for the mimamori-care system in the group home to support caregivers who take care of persons with dementia (PWD). We investigated the effects of the prototype, which consists of several cameras and monitors, by interviewing eleven caregivers. We found that the prototype system not only helps the caregivers to watch out the people with dementia but also removes some stress caused by taking excessive precaution to residents' behaviors. Caregivers however reported some concerns to the violation of privacy as for the caregivers themselves and the residents alike.