A text visualization system which allows a user to efficiently ascertain a result of clustering of texts is provided. A clustering system (1) includes a representative text display unit (51), a reception unit (55), and an element text display unit (52). The clustering system (1) is accessibly connected to a storage that stores a plurality of texts and information indicating a representative text and an element text that entails the representative text among the plurality of texts. The representative text display unit (51) displays a plurality of representative texts. The reception unit (55) receives a designation of a specific representative text among the plurality of representative texts. The element text display unit (52) extracts, in response to receiving the designation of the specific representative text, an element text that entails the designated specific representative text from the plurality of texts, and displays the extracted element text.