1. Large-scale citation analysis -Academic Landscape- J. Mori, Y. Kajikawa, and I. Sakata Innovation Policy Research Center The University of Tokyo 2. Innovation Policy Research Center Established in 2008 Part of Graduate School of Engineering Mission Analyzing data such as scientific papers, patents, Web, and governmental data using text mining and network analysis Evidence-based policy making Science and Technology policy Innovation policy 3. Our citation analysis Goal Overview of a research field Academic Landscape Detection of Emerging research fields science and technology road maps 4. Our Citation Analysis Method overview Input Query which represents a particular field of interest Academic Landscape Citation network Clustering Visualization 5. Our Citation Analysis Method Clustering Agglomerative hierarchic clustering algorithm Modularity Q as the quality of a division Dense internal connections between the nodes within modules but only sparse connections between different modules. Visualization Large graph layout algorithm Spring model-based layout Each edge is considered to be a spring, and the node positions are chosen to minimize the global energy of the spring system