A setting unit is configured to, when the image content is to be displayed across the display screens of the plurality of display devices with the non-display area therebetween, set a display area including a duplicated area in which the image content is partially duplicated and to be displayed on the display screens of the plurality of display devices. A determination unit is configured to determine whether the image content includes a specific content represented by character/symbol information or image-recognized character/symbol information. A duplicated display processing unit is configured to, on determination of the determination unit that the image content includes the specific content, set a duplication width of the duplicated area based on a width of the specific content and display the image content of the duplicated area on the display screens of the plurality of display devices.