This IDC study (a translation of the Japanese document IDC #J15620102) defines the Japan enterprise IT infrastructure market. In analyzing trends in the Japan enterprise IT infrastructure market and forecasting its scale, IDC adopts perspectives from other areas such as architecture/design, IT resource delivery, and procurement. Details on classification methods are summarized based on these perspectives. Note that servers, storage systems, and network equipment were surveyed as enterprise IT infrastructure components. IDC Japan server group manager Satoshi Fukutomi explains: "IT infrastructure suppliers must engage in essential discussion and reconsider how they should conduct their hardware businesses, such as in which functions (such as those related to design, manufacturing, sales, and maintenance; and the knowledge they have built up) to maintain their competitive edge against competitors, and how to leverage this edge."