People with higher brain dysfunction show executive impairments, attention deficits, and/or memory disorders. Monitoring and analyzing their activities during day-care rehabilitation is important to understand their individual needs. However, monitoring and analyzing these activities are cumbersome for clinicians. As a result, the rehabilitation is usually designed by the experiences of the clinicians and their interpretations of objective neuropsychological tests typically performed months earlier. For this reason, we developed a day-care rehabilitation support system. One of the real rehabilitation activities, a card game, has been implemented within the framework of this system. This system can record the user's interactions, such as mouse clicking and movements, and to analyze the results, for example, the number of correct and incorrect operations and the distance moved by the mouse can be determined. The system can be used to visualize these data via the following views: months, hours in a day, number of repetitions, and in a single game. The results of our case study conducted over several months suggest that quantitative observations using this system can be useful to understand individual characteristics.