At this small-scale facility, the main room consists of floor space and a tatami area. This paper aims to explain the relation between the factors which specify the areas dedicated to leisure time, meals, napping, and functional training, and the actions of users and staffs. The analysis focused on the relation between the tatami corner's floor level difference with the main room's floor space, and users' daily life acts or staffs' acts of care. Based on the acquired knowledge, I focused on the room's usage composition at this small-scale facility, which installed a tatami corner.