This study aims to better estimate the amount of time spent for child care and to understand the characteristics of time spent for child care among employed and non-employed mothers with children under age 6 by taking concurrent activities into account. To assess time spent for child care, I differentiate child care activities into three types: primary activity without concurrent activities, primary activity with concurrent activities, and secondary activity with concurrent activities. The Major results of this study are as follows: First, there were differences in all types of time spent for child care among employed and non-employed mothers during weekdays, while the difference was only significant in the average amount of primary time spent for child care without concurrent activities on weekends. Second, there was no difference in the average ratio of time spent for child care with concurrent activities among employed and non-employed mothers during weekdays. By contrast, the average ratio of time spent for child care with concurrent activities of employed mothers was 5% higher than non-employed mothers on weekends. Lastly, the highest concurrent activity with child care activities was leisure followed by housework. This means that child care, leisure, and housework are somewhat related to each other among mothers.