An information communications system for an overlay network includes: a plurality of node devices which are connected to each other through a network and constitute the overlay network, contents being distributed and stored in the plurality of node devices, the plurality of node devices including a contents source transmitting contents to other node devices. The plurality of node devices includes a first node device including: a contents storage unit configured to store the contents; and a limiting unit configured to limit uploading of the contents stored in the contents storage unit,