An electronic apparatus includes a memory and circuitry. The memory stores a plurality of programs, and program registration information including identification information of the plurality of programs each of which is permitted to be executed in the electronic apparatus. The circuitry executes a first program of the plurality of programs stored in the memory. The circuitry executes a second program according to a determination that the identification information of the program registration information includes identification information of the second program stored in an external memory connectable to the electronic apparatus. The circuitry causes the first program and the second program, which are executed, to be communicable with each other to newly add a function to the electronic apparatus.