Information recording medium, information recording method, and information reproduction method

An information reproduction method that reproduces information recorded in an information recording medium that records the information using an arrangement of a micro-denatured region formed by irradiating an inside of a light-transmitting medium with a pulsed laser beam, wherein

• the micro-denatured region is formed in each of a first layer and a second layer inside the information recording medium,
• the micro-denatured region is formed at a position corresponding to a lattice point on a two-dimensional plane orthogonal to a thickness direction of the information recording medium in each of the first layer and the second layer, and
• the information reproduction method comprises:
• a step of irradiating illumination light onto the information recording medium from a direction not orthogonal to the first layer and the second layer;
• a step of capturing the information recording medium irradiated with the illumination light with an image capturing device;
• and
• a step of reproducing the information from an image captured with the image capturing device.