In an image forming apparatus, an agitator agitates the toner in a target agitation amount before the image forming portion forms the image. The target agitation amount represents an amount of actions of agitation imparted upon the toner by the agitator. A processor is configured to: obtain at least one of a degradation level of the toner, the image to be formed, a non-agitation time period during which the agitator has not agitated the toner; set the target agitation amount based on the at least one of the degradation level of the toner, the image to be formed, and the non-agitation time period; perform agitating the toner in the target agitation amount by the agitator; and control the image forming portion to form the image after the agitator agitates the toner in the target agitation amount.