Decreasing diversity in Japanese science, evidence from in-depth analyses of science maps

This study aimed to monitor the status of scientific research in Japan, especially the diversity of scientific research, based on in-depth analyses of science maps. Analyses of six consecutive maps showed decreasing diversity in Japanese science relative to benchmarking countries. We proposed a new concept for a Sci-GEO chart (representing geographical characteristics of research areas on a science map) that aims to classify research areas in...