Patent ID: 7844139

Claim:
An information management apparatus comprising: a feature-amount storing unit to store information in association with a feature-amount representing contents of the information; a similarity-information-list storing unit to store the information in association with a similarity-information list that includes at least one piece of similarity information corresponding to a feature-amount of which a similarity indicating a degree of being similar to the feature-amount of the information is larger than a predetermined threshold; and a processor configured to extract a first feature amount of first information that is target information to be registered; search the feature-amount storing unit for a second feature amount of second information; calculate a similarity between the first feature amount and the second feature amount; and register the first information in association with the similarity-information list in the similarity-information-list storing unit, the similarity-information list including the second information corresponding to the second feature amount of which the calculated similarity is larger than the threshold, as the similarity information.