The only other countries in the region with manufacturing were the Soviet's to the North, who's designs we're all fairly familiar with, and China, who I believe had factories manufacturing copies of Western arms. This months American Rifleman has a story about an Italian Navy Beretta that was gifted by a Japanese Officer, so the design would not have been totally unknown.
I would say that no one but the Jap's fielded such rough pistols, (It had to do with their mindset toward fire arms ) what ever it is supposed to be, it was made in Japan.