To make research methods efficient, various products have been developed since the era of paper media, such as facsimile editions, microfilms, catalogues, concordances, and articles, and these have formed a network of research resources. Recently, they have gradually been replaced with digital resources. However, digital resources not only include several issues by their nature, but also reveal intrinsic problems in research resources which had been implicitly ignored in paper media. To hand down Indian and Buddhist studies into the future, we should address them seriously.
