9. The text generation device according to claim 6 , further comprising: generation rule acquisition means for automatically acquiring a character-unit candidate generation rule from the extracted sentence or phrase; wherein the phrase candidates are generated using the generation rule in the character-unit candidate generation means.
9. The text generation device according to claim 6 , further comprising: generation rule acquisition means for automatically acquiring a character-unit candidate generation rule from the extracted sentence or phrase; wherein the phrase candidates are generated using the generation rule in the character-unit candidate generation means. 10. The text generation device according to claim 9 , wherein, in the generation rule acquisition means, the sentence or phrase extracted in the extraction means is analyzed by using a morphological analysis and/or a syntactic analysis, and an analyzed phrase containing the keywords is used as a generation rule.