In one embodiment, an information processing apparatus includes a calculation section, an identification section, and a notification section. The calculation section is configured to calculate similarity among a plurality of documents. The identification section is configured to identify, in response to a change made to a first document, a second document having a similarity greater than or equal to a first criterion as compared to the first document before the change. The notification section is configured to notify a user of the identified second document that the first document has been changed, in response to the change to the first document.