Lithographic printing plate precursor, method of preparing lithographic printing plate, and lithographic printing method

A lithographic printing plate precursor comprising:

• an aluminum support;
• and
• an image recording layer on the aluminum support,
• wherein the aluminum support includes an anodized film on a surface of the image recording layer side,
• the anodized film has micropores extending in a depth direction from the surface of the anodized film on the image recording layer side,
• an average pore diameter of the micropores in the surface of the anodized film is greater than 0 μm and 0.03 μm or less,
• an average maximum diameter of the micropores inside the anodized film is in a range of 0.04 μm to 0.30 μm,
• an average value A nm of thicknesses of surface opening portions starting from the surface of the anodized film and having a pore diameter inside the anodized film of greater than 0 μm and 0.03 μm or less and an average value B nm of thicknesses of internal maximum diameter portions in which pore diameters of the micropores inside the anodized film are in a range of 0.04 μm to 0.30 μm satisfy a relationship of 2.5≤B/A≤28.0,
• the average value B of thicknesses of the internal maximum diameter portions is in a range of 500 nm to 2800 nm, and
• the image recording layer contains an acid color former.