An initialization method of initializing a consumable memory included in a consumable attached to a main casing of an image forming apparatus, the consumable memory storing capacity information indicating a quantity of a material that can be accommodated in the consumable,
- the initialization method comprising:
- obtaining, by the image forming apparatus, information indicating a quantity of the material that can be accommodated in the consumable through an operation part of the image forming apparatus, the operation part including at least one of a physical button or a touch panel;
- and
- rewriting, by the image forming apparatus, the capacity information so that the capacity information indicates the obtained information.