The paper introduces a Web system which supports registration of scholarly papers to institutional repositories. Institutional repository is an important service for academic societies, however the number of archived papers is not enough in most of institutions. The authors of the paper developed a system that supports authors of papers (that is, researchers) and managers of repositories in registration of papers. By connecting with external databases of published research papers, the system urges researchers register their papers to repository. Additionally, the system automatically searches the copyright policy for each paper also using external databases. This paper makes clear the problem of current institutional repositories, and then describes the detailed idea of the developed system as a solution. The system is expected to decrease the efforts of researchers and managers for paper registration, and increase the number of archived papers in institutional repositories thereby.