An inkjet recording system including a separation unit configured to obtain separated data which corresponds to each of a plurality of nozzle arrays from input image data, a gradation correction unit configured to perform gradation correction by one-dimensional conversion on the separated data obtained by the separation unit, and a quantization unit configured to quantize the data on which the gradation correction is performed by the gradation correction unit to generate the recording data, wherein the separation unit obtains the separated data so that first separated data and second separated data corresponding to at least a pair of nozzle arrays for adjusting an effect of an air current have a same value, and the gradation correction unit performs different gradation correction on the first separated data and the second separated data which have the same value.