Hi, I'm a Japanese WitP and Matrix's Wargame fan from Tokyo, Japan, and this argument is very interested to me.
OK, from my conclusion, Taki & AE dev team are totally right. In the beginning of the war, Japan had only 3 units which have airborne capability. IJN Yokosuka 1st SNLF, 3rd SNLF and IJA 1st Teishindan.
As far as I know, There is
NO fact such as Yokosuka 2nd SNLF had ever trained as paratroopers or had ability of airborne operations in 1941.
I don't know why English wiki was written such wrong description.
This is Japanese IJN Airborne force story WIKI (but you could not read it on Japanese font installed).
http://ja.wikipedia.org/wiki/%E6%97%A5% ... 8%E9%9A%8A
And these descriptions are correct as my knowledge from domestic military books (maybe most of them are
not translated by English) that I ever read for years.
Try to summarize...
November, 1940, After the success of German airborne operations in Europe, Japanese naval minister ordered research of paratroop to IJN as the most confidential project.
This project called "Dai 1001Jikken (1001st Experiment)" was lead by Yokosuka Kaigun Koukutai (Yokosuka Naval Air Wing) and tried to research such as tower-used para drop experimentation , how to transport paratroopers, weapons, ammunition, supply and real para drop from airplane(sadly it happend some dead accidents ) .
This project had completed in May 1941.
August 1941, the members of "Dai 1001Jikken" were transfered Tateyama naval district in Chiba near by Tokyo.
Gunreibu (IJN's top military controller, not "Daihonei") ordered 1500 paratroopers training in 2 months.
September 20, 1941, Yokosuka 1st SNLF was organized at Tateyama district (NOT Yokosuka district) and only trained as paratroopers.
November 20, About 1500 paratroopers of Yokosuka 1st SNLF divided as 1st and 3rd SNLF.
Transport airplanes of Tateyama Kaigun Koukutai(Tateyama Naval Air Wing) also called "1001st force"that belonged to Dai 1 Koukutai( IJN 1st Air Wing later called 752 ku) and supported paratroop units.
November 20, 1941, Yokosuka 1st SNLF has 849 soldiers included 750 paratroopers, consisited of 3 companies and small artillery, and same as 3rd SNLF. that's the history.
Thanks to read and hope this helps.
trivia 1: On the way Menado raid, One F1M2 PETE from IJN AV Mizuho misfired transporters squadron of Yokosuka 1st SNLF and shot down one plane(all soldiers and crew were KIA). the pilot knew the fact and tried to suicide for his failure. But his commander said "You must not die but struggle more and more offered all your life. it is only way of your atonement for victims." and stopped his suicide.
trivia 2: The battle of Yokosuka 1st and 3rd SNLF were later filmed as hand-drawn animation story (charactars replaced by pretty animals) called "Momotaro : Sora no Shinpei"(1944).
This animation film was so much inspired by Walt Disney's Fantasia and became one of ancestors of so-called Japanese ANIME.