Abstract
This study focuses on"technology roadmaps" which are developed and used in various high-tech areas such as semiconductor, telecommunications and new materials. In those areas where the rate of technological change is very large and complicated mixture of technologies is indispensable for creating new products, needs for technology roadmaps are recently growing with a view to prioritize and establish appropriate directions of R&D investments. In this study, we illustrate the usefulness and the future directions of Japan's technology roadmaps based on comparative analysis between the US and Japan.