Provided is an image processing apparatus including a memory that stores information, and a reduced image generation unit that extracts a row including a distinguishable part from other rows as a heading from a vertically long range from top to bottom on a left end side when document data is horizontally written, extracts a row including a distinguishable part from other rows as a heading from a horizontally long range from a right end to a left end on an upper end side when the document data is vertically written, and generates a portion including the heading as a reduced image.