In an information recording system, a sound processing unit generates a conversion candidate word in a process of converting sound information into text information. A recording unit records the text information and the conversion candidate word on a recording medium such that the text information and the conversion candidate word are associated with each other. A search unit performs a search based on a keyword and extracts a word matching the keyword from words within the text information and the conversion candidate word. A reading unit reads the text information including the word matching the keyword from the recording medium. A display unit displays the text information such that a part corresponding to the word matching the keyword and a part other than the corresponding part are able to be distinguished.