Image forming apparatus

An image forming apparatus comprising:

• an image bearing member;
• a development device configured to include a developer accommodation portion configured to accommodate a developer including a toner and a carrier, and a developer bearing member configured to carry and convey the developer, and develop an electrostatic image formed on the image bearing member using the toner;
• a detection portion configured to detect a toner density of the developer accommodated in the developer accommodation portion;
• a developer replenishment container configured to be detachably attached to the image forming apparatus, accommodate the developer including the toner having a fine particle attached to a surface of the toner, and replenish the developer to the developer accommodation portion;
• a storage portion configured to be provided in the developer replenishment container, and store information specific to the toner accommodated in the developer replenishment container;
• and
• a control portion configured to set a target toner density of the developer based on the information stored in the storage portion and then control the toner density of the developer accommodated in the developer accommodation portion based on a result detected by the detection portion so that the toner density of the developer accommodated in the developer accommodation portion is the target toner density of the developer.