A tag communication device performing radio communication with a radio frequency identifier (RFID) tag comprising a light emitting unit, the tag communication device comprising: a communication unit that performs radio communication with the RFID tag; an imaging unit that images at least a part of a communicable range of the communication unit; and a control unit, wherein the control unit performs: an acquisition process of acquiring a tag identification of one or more RFID tags present in the communicable range of the communication unit through the communication unit; a transmission process of transmitting a light emission instruction to at least some of RFID tags corresponding to the acquired tag ID through the communication unit; a determination process of determining presence/absence of light emission of the light emitting unit based on the light emission instruction within an imaging area of the imaging unit on the basis of a result of imaging acquired by the imaging unit; and an operation process of performing a predetermined operation for an RFID tag to which the light emission instruction has been transmitted through the communication unit in a case in which it is determined that light emission of the light emitting unit based on the light emission instruction is present; the tag communication device being characterized in that, in a case in which (i) tag IDs of two or more RFID tags are acquired in the acquisition process, and (ii) it is determined that light emission of the light emitting unit based on the light emission instruction is present for one RFID tag among the two or more RFID tags in the determination process, the control unit continuously transmits the light emission instruction also to the remaining RFID tags among the two or more RFID tags in the transmission process. a communication unit that performs radio communication with the RFID tag; an imaging unit that images at least a part of a communicable range of the communication unit; and a control unit, wherein the control unit performs: an acquisition process of acquiring a tag identification of one or more RFID tags present in the communicable range of the communication unit through the communication unit; a transmission process of transmitting a light emission instruction to at least some of RFID tags corresponding to the acquired tag ID through the communication unit; a determination process of determining presence/absence of light emission of the light emitting unit based on the light emission instruction within an imaging area of the imaging unit on the basis of a result of imaging acquired by the imaging unit; and an operation process of performing a predetermined operation for an RFID tag to which the light emission instruction has been transmitted through the communication unit in a case in which it is determined that light emission of the light emitting unit based on the light emission instruction is present; the tag communication device being characterized in that, in a case in which (i) tag IDs of two or more RFID tags are acquired in the acquisition process, and (ii) it is determined that light emission of the light emitting unit based on the light emission instruction is present for one RFID tag among the two or more RFID tags in the determination process, the control unit continuously transmits the light emission instruction also to the remaining RFID tags among the two or more RFID tags in the transmission process. an acquisition process of acquiring a tag identification of one or more RFID tags present in the communicable range of the communication unit through the communication unit; a transmission process of transmitting a light emission instruction to at least some of RFID tags corresponding to the acquired tag ID through the communication unit; a determination process of determining presence/absence of light emission of the light emitting unit based on the light emission instruction within an imaging area of the imaging unit on the basis of a result of imaging acquired by the imaging unit; and an operation process of performing a predetermined operation for an RFID tag to which the light emission instruction has been transmitted through the communication unit in a case in which it is determined that light emission of the light emitting unit based on the light emission instruction is present; the tag communication device being characterized in that, in a case in which (i) tag IDs of two or more RFID tags are acquired in the acquisition process, and (ii) it is determined that light emission of the light emitting unit based on the light emission instruction is present for one RFID tag among the two or more RFID tags in the determination process, the control unit continuously transmits the light emission instruction also to the remaining RFID tags among the two or more RFID tags in the transmission process.