Abstract. To find hidden features of co-authoring relationships, we focused on drawing techniques for bipartite graphs. We previously developed a drawing method called "anchored maps", which is used to depict bipartite graphs visually. In anchored maps, some nodes are restricted to certain positions, but others are left to be arranged freely. In this study, we used our method to depict co-authoring relationships as anchored maps. The maps revealed certain co-authoring relationships. Anchored maps can help us discover important features that we cannot find when using only bipartite graphs that have a free layout.