1. A terminal, comprising: a transmitter configured to transmit a request to a terminal management device to determine whether or not the terminal is allowed to execute an update of a program; circuitry configured to, in response to receiving, from the terminal management device, information indicating that the terminal is allowed to execute the update of the program, determine, using a table associating each of a plurality of terminal types with a respective power supply confirmation necessity indication, whether or not it is necessary to confirm that the terminal is connected to a power supply, and when it is determined that it is not necessary to confirm that the terminal is connected to the power supply, acquire an update program from an update management device, the update management device being different than the terminal management device, and execute the update program received from the update management device.