1. An image coding method performed by a processor in accordance with instructions stored in a memory, comprising: defining a plurality of regions of interest on a moving image; encoding the moving image; and generating a codestream containing coded data of the moving image, with information for specifying the plurality of regions of interest defined on the moving image being explicitly described in distinction from coded data of the moving image, not as a header for each frame of the moving image, but in the codestream, wherein the information for specifying the plurality of regions of interest includes information indicating whether the display of each of the regions of interest is essential, wherein if the information indicates a region of interest as not essential, that region of interest is not displayed, and wherein the information includes a degree of priority thereof.