Abstract
In recent years, the number of children with special needs in childcare centers has been increasing, and there is a growing need for collaboration between childcare workers and outside experts. However, various issues have been pointed out regarding multidisciplinary collaboration in childcare. This paper reviews and analyzes previous studies on the basis of the activity system model to clarify the historical transition process and current issues of multidisciplinary collaboration in childcare. The results revealed historically recurring processes and tensions that are likely to manifest in childcare. These findings are considered to be a resource for the development of multidisciplinary collaboration.