The 9mm Japanese revolver, also known as the 9×22mmR Type 26, was a cartridge similar to the .38 S&W. These cartridges are not interchangeable. The rim diameter is thinner and the chamber pressure is lower than most .38 S&W loads.^[1] The cartridge saw service with the Type 26 revolver in the Russo-Japanese War, World War I, and World War II in a limited role. The Type 26 was later replaced as the service pistol of the Imperial Japanese Army by the semi automatic Nambu pistol, which was chambered for the 8x22mm Nambu cartridge.

This article relies largely or entirely on a single source. (March 2021)