Sub-categories in this section are listed in chronological order based on first date of issue.  This may provide the reader with a better sense of timing regarding the development and introduction of new mail types as Japan became more international.

There are certain chronological gaps that still need to be filled. If you have items that are not displayed and would be willing to contribute images to fill these gaps, please submit to the japanesephilately e-mail address detailed in the footer section of each webpage.