The number of a child who stays alone in his/her home in daytime has increased as double-income family, women's participation into the society and the numbers of nuclear families are increasing. Therefore, the demand for After-school care for children has increased. However, some facilities have only accepted a limited number of children due to supervising instructor shortage and so on. So many children stay alone in their homes who hope to attend an after-school care facility.
In this study, we developed an application which displays children's group composition by using a sociogram to support the after-school care for the children. We proposed a new sociogram that is possible to make the sociogram without conducting sociometric test by paying attention to data whom did a child play with and display the children's sociality.
Children's group composition and sociality have been expressed through numerical experiment based on data from an after-school care for children. Some improvement points of the proposal method could be found for a future study.