Abstract
Recently, the sites in internet on which users can write private ideas and opinions are increasing. In addition, the number of people who want to know other's opinions about the interested products is also increasing. However, it is very difficult for people to read whole reviews on internet. This study tries to develop a new review analysis system which shows evaluation information about products using graph structure of evaluation keywords. This paper focuses on the part of extraction of evaluation keywords from reviews on internet. This paper shows the extraction method for evaluation keywords and the result of keyword graph structure with extracted evaluation words. It employs HK Graph (Hierarchical Keyword Graph) which can visualize the relationship among words with hierarchical network structure based on the co-occurrence information for the keyword graph.
