Linked notification system, portable communication device, and linked notification method for portable communication device

A linked notification system configured by communication-connecting at least one external device to a portable notification device, wherein

• the portable notification device comprises a first processor, a nonvolatile memory, a first communication device performing communication with the external device, and a notification device sending a notification to a predetermined notification destination,
• each of the external devices has a second communication device performing communication with the portable notification device,
• the nonvolatile memory stores notification control information in which a notification destination is associated with a notification condition defined by using a state of the external device, and
• the first processor, on receipt of a state signal indicating a state of the external device from the external device, refers to the notification control information, determines whether the notification condition is satisfied or not on the basis of the state signal, and
• when it is determined that the notification condition is satisfied, executes control for sending a notification to a notification destination associated with the notification condition on the notification device.