This study (a translation of the Japanese document IDC #J16250101) forecasts spending in the Japan enterprise IT infrastructure market for 2015–2019. It also forecasts the Japan traditional IT infrastructure and Japan cloud IT infrastructure submarkets separately, as well as forecasts by component within these submarkets. IDC Japan enterprise infrastructure Group Manager Satoshi Fukutomi explains, "As long as the basic trend of moderate economic recovery continues, companies whose investment capacity has recovered will actively spend to transform their in-house IT platforms into cloud. Companies will also continue to look for business using innovation accelerators on the 3rd Platform. Going forward, there will be an increase in the number of concrete use cases for Big Data and analytics and IoT in Japan. New spending by companies challenging themselves with similar endeavors will underpin spending in the Japan enterprise IT infrastructure market."