Abstract: An information processing system includes: a supply chain network acquisition section configured to acquire a supply chain network, in which a plurality of nodes corresponding to a plurality of companies are linked based on open information; an input receiving section configured to receive a selection operation of selecting any of the plurality of companies as a company of interest; a sub-network extraction section configured to perform a process of extracting, from the supply chain network, a sub-network including either one or both of an upstream sub-network and a downstream sub-network; a company-of-special-interest identifying section configured to identify a company of special interest that meets a given condition in the sub-network; and a presentation processing section configured to perform a process of presenting information on the company of special interest.