1. An inkjet recording apparatus comprising: a calculation section configured to calculate respective densities of first regions in pairs included in an image; a selection section configured to select dot patterns corresponding to the respective first regions according to the respective densities of the first regions calculated by the calculation section; and a recording head configured to eject ink onto a sheet based on a dot pattern corresponding to a region of the image other than the first regions and the dot patterns corresponding to the respective first regions, wherein the first regions in pairs are end portions in pairs among a plurality of end portions of the image that each extend in a conveyance direction of the sheet, and the dot patterns corresponding to the respective first regions each have a density lower than a corresponding one of the densities of the respective first regions calculated by the calculation section.