A home screen display unit displays a global navigation screen 12 that is located on an upper layer with respect to a screen transition and that is used for selecting a category of content to be processed. The home screen display unit displays a content zone screen 18 that is located on a lower layer with respect to a screen transition and that is used for selecting a piece of content to be processed from among a plurality of pieces of content corresponding to the category selected in the global navigation screen 12. If a specific piece of content is selected in the content zone screen 18, a game screen display unit displays a screen of the selected content. The home screen display unit displays, in the global navigation screen 12, an image of at least a portion of the content zone screen 18 with image quality lower than that in the case where the image is displayed in the content zone screen 18.