TEXT ANALYSIS METHOD, NON-TRANSITORY COMPUTER-READABLE RECORDING MEDIUM FOR STORING TEXT ANALYSIS PROGRAM, AND TEXT ANALYSIS SYSTEM

Pieces of text having a correspondence relationship are searched with precision. By a text analysis method performed by a text analysis system, constitutional units of text obtained by executing element decomposition processing are generated from each of first text and second text. Similarity of each constitutional unit pair between the constitutional units of the first text and the constitutional units of the second text is measured. Whether each constitutional unit pair is either a synonym with the similarity equal to or more than a specified value or a related word with the similarity less than the specified value is judged. A related word applicable area to which the related word is to be applied from the second text is identified on the basis of the judged synonym. A correspondence relationship between the related word applicable area and the first text is judged on the basis of the judged related word.