An information analysis apparatus that performs an analysis on text information to determine whether or not the text information corresponds to the target information. The information analysis apparatus includes a storage device that stores the text information; a density estimation unit that estimates, in units of analysis each composed of a plurality of sentences of text information, a density indicating the degree to which the target information is included in the unit of analysis; and a determination unit that obtains an evaluation value indicating the degree to which each sentence included in each unit of analysis corresponds to the target information from the estimated density of the unit of analysis, and determines whether or not the sentence corresponds to the target information based on the evaluation value.