In an embodiment, an information processing apparatus includes: a converting unit; a selecting unit; a dividing unit; a generating unit; and a display processing unit. The converting unit recognizes a voice input from a user into a character string. The selecting unit selects characters from the character string according to designation of the user. The dividing unit converts the selected characters into phonetic characters and divides the phonetic characters into phonetic characters of sound units. The generating unit extracts similar character candidates corresponding to each of the divided phonetic characters of the sound units, from a similar character dictionary storing a plurality of phonetic characters of sound units similar in sound as the similar character candidates in association with each other, and generates correction character candidates for the selected characters. The display processing unit makes a display unit display the generated correction character candidates selectable by the user.