An information processing apparatus includes a memory to store drawing data including stroke information, generated in response to a handwriting operation, and audio data collected by a terminal apparatus, the audio data being associated with user identification information identifying a user of the terminal apparatus, and circuitry to acquire the drawing data acquired at a specific time point and the audio data collected in a data-acquiring period including the specific time point, transmit the audio data and a request for converting the acquired audio data to a language processing apparatus into first text data, acquire the first text data from the language processing apparatus, compare the stroke information of the drawing data and the first text data to determine whether the stroke information matches the first text data, and convert handwritten-information indicated by the stroke information to second text data when the stroke information matches the first text data.