The Type 100 submachine gun was broadly patterned after the early German designs, with a wooden half-stock and a curved magazine inserted from the left. Following Japanese practice, it could mount a bayonet, although it was really too short for this. Only some 10,000 were made at Kokura arsenal, plus another 6,000 with a folding stock at Nagoya arsenal, and in 1944 a further 8,000 of an improved pattern, with the result that Japan never had enough submachine guns and relied heavily on machine guns. The Type 100 was primarily issued to Japanese paratroopers.