small amount of early Type 100 models were produced by the Chuo Kogyo Company, while the late model was produced at the Nagoya Arsenal's Toriimatsu Factory from May 1944 until the end of the war, at a pace of approximately 1,000 per month. He estimates that the total number produced is about 10,000, nearly 9,000 of them being later models. The later version Type 100s were used by special units of the Imperial Army and were encountered in the hands of paratrooper raiding units in the Philippines Campaign and in the Battle of Okinawa, notably used by Giretsu Kuteitai airlifted special forces. After the war, a limited number was supplied by the American administration to arm the Japanese police. See also List of common World War II infantry weapons List of submachine guns References External links 8 mm Submachine Gun, Type 100 (1940) , Catalog of Enemy Ordnance, 1945. 8×22mm Nambu submachine guns Submachine guns of Japan Weapons and ammunition introduced in 1942 World War II infantry weapons of Japan World War II submachine guns