An information reproducing device (200) comprises: reproducing means (202, 205, 206) for reproducing recording information recorded on an information recording medium (100) including a first recording layer (L0) to which first medium region information (110) is allocated and a second recording layer (L1) to which second medium region information (120) is allocated; a storage means (209) for storing device region information (230); a judging means (207) for judging whether or not the second medium region information and the device region information coincide when the first medium region information and the device region information do not coincide; and a control means (207) for controlling the reproducing means so as to reproduce the recording information recorded in the second recording layer when the second medium region information and the device region information coincide.