The creation of and activities which made animation and cartoon films the subject of search are expanding rapidly, and enormous amounts of information about these are being sent to the Web. In the case of subject search, the user typically uses the “Topic” keyword to display information content. Searching by “Topic”, however, is difficult due to an insufficiency of metadata and lack of maintenance. This study proposes a method to maintain and create metadata about the subject of a work automatically. It becomes possible to apply this metadata to bibliographic information of a work to assist in the searching of it contents.