A sheet characteristic detection device includes: a detector that is disposed on a sheet ejection path through which a sheet is ejected and that detects an electrical resistance value of the sheet; and a charge neutralizer that is disposed on a downstream side of the detector on the sheet ejection path and that neutralizes electric charge on the sheet.

An image forming system includes: an image former that forms images on a plurality of recording media; an inspector that detects a quality abnormality of at least one of the recording media on which at least one of the images is formed; and a controller that causes a recording medium on which an image identical to an image on an abnormal recording medium is formed to be ejected to a first ejector, the abnormal recording medium being a recording medium on which the quality abnormality is detected.