An information processing system of the present invention includes a data generation device that generates variable data, and a rendering device that performs rendering of the variable data. A first data storing unit of the data generation device stores, as a first correspondence relationship, the generated variable data and identification information for identifying the variable data in association with each other, and a first data management unit manages the first correspondence relationship based on a predetermined management scheme. A cache search unit searches for predetermined variable data from the first correspondence relationship, and a cache hit determination unit determines that rendering data obtained by performing rendering on the variable data is cached when there is predetermined variable data in the first correspondence relationship.