Image forming apparatus

An image forming apparatus, comprising:

• an image forming unit configured to form an image by using a developer;
• a mounting unit to which a container is to be mounted, wherein the container in which a developer is contained;
• a door, wherein the door is to be opened to mount the container to the mounting unit or remove the mounted container from the mounting unit;
• a motor;
• a controller configured to control the motor to rotate the container mounted to the mounting unit;
• a sensor configured to detect a predetermined portion in a rotation direction in which the mounted container is rotated;
• and
• a communication unit configured to communicate with a memory of the container mounted to the mounting unit,
• wherein the controller, after the mounted container is rotated, controls the motor so that the predetermined portion is detected by the sensor when a rotation of the mounted container is stopped,
• wherein, in a case where the door is closed, the controller determines, based on a detection result of the sensor, that the container mounted to the mounting unit,
• wherein, in a case where the door is opened, the controller determines, based on a communication condition of the communication unit, that the mounted container removed from the mounting unit.