[目的/意义] 通过收集日本大学机构知识库的社会化应用行为相关信息，分析日本大学机构知识库的社会化应用行为现状。[方法/过程] 通过文献调研了解目前有关机构知识库社会化应用行为相关研究的研究情况，并且通过访问不同机构知识库网站、不同大学的校内数据库网站与日本国立信息学研究所的相关网站来梳理机构知识库与其他领域数据库的关联关系。[结果/结论] 日本大学机构知识库通过在出台的政策文件中明确自身定位，针对IR资源发布专门描述元数据格式，OAI-PMH的应用以及数据库之间数据互操作等措施来加强社会化应用程度。在未来数据互操作对象还将扩展到出版行业等相关领域并开展更加深入的数据服务。

[Purpose/significance] Based on the information of institutional repositories in Japan which have been collected and studied, this paper makes research on the present situation about the socialized application of institutional repositories in Japan. [Method/process] By the literature investigation, the author visited different sites of institutional repositories, libraries and databases of universities, as well as the sites of National Institute of Informatics to research the relationship between institutional repositories and other databases. [Result/conclusion] Based on the analysis, the socialized application of institutional repositories in Japan is known and this paper discusses it from four views: self-localization, data format, OAI-PMH protocol and system interoperability.