Patent ID: 8194516

Claim:
An information recording apparatus for recording information onto an information recording medium in a disc shape, comprising at least: a first recording layer and a second recording layer, located on a rear of said first recording layer as viewed from an irradiation side of a laser light for recording, said information recording apparatus comprising: a first test writing device for test writing a first test-write information for calibration of the laser light by irradiating the laser light by using an area portion of a predetermined size in order in an opposite direction of a track path of the first recording layer, in a first test writing area in the first recording layer; a second test writing device for test writing a second test-write information for calibration of the laser light for recording by irradiating the laser light by using an area portion of a predetermined size in order in an opposite direction of a track path of the second recording layer, in a second test writing area, which faces the first test writing area, in the second recording layer; and a recording device for recording the information into said first recording layer or said second recording layer, the first and second test writing device test writing the test-write information, respectively, such that an area of the first test writing area into which the first test-write information is test-written and an area of the second test writing area into which the second test-write information is test-written are away from each other in a radial direction of said information recording medium as viewed from a normal direction of said information recording medium.