Nowadays university-industry collaboration is highly promoted in various areas by various ways. In this study we try to evaluate university-industry linkage objectively through analysis of co-authorship of academic publications. To assess the university-industry collaborative activity comprehensively, we choose to use the National Citation Report for Japan (NCR-J) of Thomson Scientific, and Citation Database for Japanese Papers (CJP) of NII as well, to investigate and discuss the situation, trends and characteristics of Japanese university-industry linkages from both international and national perspective.