An information processing device, comprising: a light emission control unit configured to perform control such that a first light emission instruction is output to a first input device if first identification information has been received from the first input device by the information processing device; and a processing unit configured to: associate first light emission position information indicating a position where light has been emitted by a first light emission unit of the first input device, with the first identification information, if the first light emission position information has been acquired by the information processing device, based on a captured image, in a first time period since the output of the first light emission instruction, wherein the light emission control unit is further configured to perform control such that a light emission stop instruction is output to the first input device, if the first light emission position information has not been acquired in the first time period since the output of the first light emission instruction, and wherein the processing unit is further configured, after the first light emission position information has been associated with the first identification information and the first light emission unit of the first input device continues to emit light, to continue to associate sequentially recognized first light emission position information with the first identification information. a light emission control unit configured to perform control such that a first light emission instruction is output to a first input device if first identification information has been received from the first input device by the information processing device; and a processing unit configured to: associate first light emission position information indicating a position where light has been emitted by a first light emission unit of the first input device, with the first identification information, if the first light emission position information has been acquired by the information processing device, based on a captured image, in a first time period since the output of the first light emission instruction, wherein the light emission control unit is further configured to perform control such that a light emission stop instruction is output to the first input device, if the first light emission position information has not been acquired in the first time period since the output of the first light emission instruction, and wherein the processing unit is further configured, after the first light emission position information has been associated with the first identification information and the first light emission unit of the first input device continues to emit light, to continue to associate sequentially recognized first light emission position information with the first identification information. associate first light emission position information indicating a position where light has been emitted by a first light emission unit of the first input device, with the first identification information, if the first light emission position information has been acquired by the information processing device, based on a captured image, in a first time period since the output of the first light emission instruction, wherein the light emission control unit is further configured to perform control such that a light emission stop instruction is output to the first input device, if the first light emission position information has not been acquired in the first time period since the output of the first light emission instruction, and wherein the processing unit is further configured, after the first light emission position information has been associated with the first identification information and the first light emission unit of the first input device continues to emit light, to continue to associate sequentially recognized first light emission position information with the first identification information.