UNLOCKING SYSTEM AND CONTROL METHOD OF UNLOCKING SYSTEM, CONTROL DEVICE AND CONTROL METHOD OF CONTROL DEVICE, AND DETERMINATION DEVICE AND DETERMINATION METHOD

There is provided an unlocking system capable of improving convenience of a user. An unlocking system includes: a DK acquisition unit that acquires strength information RI on strength of radio waves of a wireless signal received by receiving antennas to ; and a DK execution unit and an unlocking execution unit that execute a shielded state determining process Sa, a region determining process Sb, and an unlocking control process Sc as an unlocking process of controlling release of a lock , the DK execution unit acquires shielding information SI on a shielded state of a wireless terminal based on the strength information RI in the shielded state determining process Sa, and corrects the strength information RI by using the shielding information SI in the region determining process Sb, and the unlocking execution unit executes control for releasing the lock based on region information ZI acquired based on the corrected strength information RI in the unlocking control process Sc.