Most folks are not familiar with the variety of Japanese handguns available beyond the basic Type 94 and Type 14 Nambus. James Brown's guide to these guns is an excellent source of information, covering the rarer handguns used by Japan as well as the variants and manufacturing changes of the main types. Like Japanese rifles, the deterioration of production through the course of the war makes the pistols pretty interesting for collectors. http://www.forgottenweapons.com/book-review-collectors-guide-to-imperial-japanes