As well you should! Derby and Brown's new effort, entitled Japanese Military Cartridge Handguns 1893-1945, now reports that the S&W .44 caliber Russian cartridge manufactured in Japan was "definitively labeled by the Japanese as the 'Type 1 Top Break Pistol Loaded Cartridge.' ". Reckon the authors consulted a different interpreter.
Actually, the interpretation found in Honeycutt's reference and Derby's first book were not that far off the mark. As I understand it, the .44 cartridge was the first modern centerfire cartridge produced in Japan. Prior to that, cartridges were of the rimfire type.