a charge device that comes into contact with a photoreceptor for an image forming process and charges the photoreceptor in a state where a voltage is applied;

a separation mechanism that holds the photoreceptor and the charge device in a separate state that is removable;

an exposure device that exposes the photoreceptor;

a developing device that forms a toner image on a surface of the photoreceptor in a state where a voltage is applied;

a toner adhesion amount sensor that detects a toner image formed on the surface of the photoreceptor to adjust an image quality;

an image quality adjuster that controls a voltage applied to the charge device, a voltage applied to the developing device, an amount of light during exposure with the exposure device, and detection of the toner image and a density of the toner image with the toner adhesion amount sensor; and

a separation removal confirmer that, with the toner adhesion amount sensor, detects whether a toner image is formed in spite of unexposure in a state where a voltage is applied to the charge device and the developing device during an initialization operation of the image forming process at a start time of use to thus perform separation removal confirmation as to whether the separate state by the separation mechanism has been removed.