When originally published in 1981, The Hand Cannons of Imperial Japan was heralded as one of the most readable works on firearms ever produced. To arms collectors and scholars, it remains a prized source of information on Japanese handguns, their development, and their history. In this new Revised and Expanded edition, original author Harry Derby has teamed with Jim Brown to provide a thorough update reflecting twenty years of additional research. The authors have retained the format and much of the text of the original edition, focusing on military cartridge arms from the 1893-1945 period. Signal pistols, foreign-procured military handguns, ammunition, holsters, and accessories are also covered. Significant changes are included based on new findings, and a great deal of new information has been added, together with color illustrations of significant specimens. A number of newly discovered variants are identified and described, and expanded tables of reported serial numbers and production data are provided. Coverage and explanation of Japanese markings has been greatly enhanced, and a detailed study of inspection marks on the most widely known Types 14 and 94 is included. An appendix on valuation has also been added, using a relative scale that should remain relevant despite inflationary pressures. For the firearms collector, enthusiast, historian or dealer, this is the most complete and up-to-date work on Japanese military handguns ever written. Like its predecessor, it is certain to become a classic firearms reference and a benchmark for further research.