Too Little Too Late: Japanese Type 100 Submachine Gun

Miles
by Miles

Japan was perhaps the least prepared of all the powers during the Second World War to have an issued submachine gun in use by combat troops. Indeed the Japanese Type 100 only saw a production run of at maximum 30,000 weapons. A small fraction of the total amount of the Japanese Imperial Forces throughout the entire war.

Actually designed through the Nambu corporation of Nambu pistol and cartridge fame, the Type 100 wasn’t anything spectacular (although other Japanese subgun prototype designs were quite interesting) for being an open bolt, magazine fed, fully automatic only submachine gun. Some of the forces that really made use of it were the Japanese paratroopers who were issued versions with a folding stock that could be easily stowed away on a combat jump.

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Miles
Miles

Infantry Marine, based in the Midwest. Specifically interested in small arms history, development, and usage within the MENA region and Central Asia. To that end, I run Silah Report, a website dedicated to analyzing small arms history and news out of MENA and Central Asia.Please feel free to get in touch with me about something I can add to a post, an error I've made, or if you just want to talk guns. I can be reached at miles@tfb.tv

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  • Major Tom Major Tom on Feb 26, 2018

    It should be noted the most famous (and arguably most effective) instance of the Type 100 being used was a paratrooper attack on a US forward airfield during the Battle of Okinawa.

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    • Major Tom Major Tom on Feb 26, 2018

      @ I first learned of it back from World At War about 10 years ago. It was a surprisingly good weapon then.

  • Rimfire Rimfire on Feb 26, 2018

    I would have thought that they could have made a copy of German SMG's. Would have seemed logical at the time, being one of the Axis partners. Look at what the Chicoms did with Russian weapon designs after WWII. Just a thought, your comments welcomed...

    • Tassiebush Tassiebush on Feb 27, 2018

      @Rimfire It's interesting because there was probably more logistical compatibility between the Chinese and Germany even though they'd be on opposite sides of the conflict in an indirect way. I don't think compatibility was really prioritised by any group in ww2 other than the broader British Empire. It certainly became a big priority in the cold war though as you pointed out.
      The strange thing too is that the Japanese introduced a new unique larger service round during the war. Seems like it would have been a good time to copy either 8x57 or maybe .303 or .3006 to be able to exploit captured ammunition or stick with what they had. They certainly didn't have coordinated arms production either. It was still only a bit more than cottage industry.

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