TWI573032B

An information processing device includes a process target item extraction unit that refers to a database that stores keyword sets, each of the keyword sets being selected preliminarily as a combination of a plurality of search keywords unlikely to be simultaneously assigned to an identical item, performs item search on a database that stores item information using each of the search keyword belonging to one of the keyword sets, and extracts a process target item an appropriateness determination unit that determine for the extracted process target item, the determination determining a search keyword that should not be assigned to the process target item as an inappropriate keyword, among respective search keywords of the keyword set used for the extraction of the process target item and an inappropriate keyword handling process unit performs an inappropriate keyword handling process to improve a search result of item search.