To provide a similar word retrieval device for efficiently retrieving similar words similar to retrieval request words whose retrieval is requested in order to quicken retrieval.
A retrieval information preparing means 431B extracts a plurality of retrieval target word characteristic information being the characteristics of respective index words acquired by a retrieval target word acquiring means 431A, and prepares index information by indexing those plurality of retrieval target word characteristics information. Also, a retrieval request word information preparing means extracts a plurality of retrieval request word characteristic information being the characteristics of keywords as retrieval request words acquired by a retrieval request word acquiring means 431C, and prepares retrieval request word information including those plurality of retrieval request word characteristic information. Then, a similar word retrieval part 431 retrieves similar words having similarity for the keywords based on the retrieval target word characteristic information and the retrieval request word characteristic information.
COPYRIGHT: (C)2005,JPO&NCIPI
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Kinoshita Minoru
Kanji Nakayama
Tsuyoshi Ishizaki