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How many troops and how much equipment did Japan

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Rob

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Apr 18, 2012, 2:14:08 PM4/18/12
to
move from the mainland to the home islands in 1945?

I believe US intel during the war detected a Japanese division moving
from Manchuria to Kyushu in April 1945.

Is there a breakdown of troop transfers by month within 1945, ie, how
many troops were moved in August 1945, July 1945, June 1945, May 1945,
April 1945, March 1945, etc.

Was "operation starvation", the aerial mining campaign supplementing
the submarine blockade, sufficient to stop all significant troops
transports from the mainland to Japan in the summer of 1945?

Anybody have a sense of how many aircraft were transferred?

Also, in this timeframe and earlier, were there any "qualitative"
rotations, where higher-quality units on the mainland were exchanged
for greener or more worn out units in the Japanese home islands?

cman...@gmail.com

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Apr 18, 2012, 4:55:20 PM4/18/12
to
On Wednesday, April 18, 2012 2:14:08 PM UTC-4, Rob wrote:
> Is there a breakdown of troop transfers by month within 1945, ie, how
> many troops were moved in August 1945, July 1945, June 1945, May 1945,
> April 1945, March 1945, etc.

I checked it out of the library (and returned it) and my notes aren't
sufficient to work off of, but if you check Ellis' _World War Two: A
Statistical Survey_ he has a division-by-division movement record for
every army, including the Japanese. From that you could see which
divisions moved where when. This wouldn't be exactly accurate, because
of all the vagaries of division-counting, but it would give you a good
approximation.

According to my notes (based off of looking over the records, not
anything statistical), most of the movement of Japanese divisions was
complete by October 1944, and after that point only a handful of
Japanese divisions moved by sea.

Chris Manteuffel

Paul F Austin

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Apr 18, 2012, 6:05:47 PM4/18/12
to
According to John Ray Skates in "The Invasion of Japan", the Japanese
High Command planned to fight the battle of Japan with newly raised
formations. In March 1945 raised eighteen coastal defense divisions. In
May eight maneuver divisions, six tank brigades and five tank regiment.
Only four divisions were transferred from the Kwantung Army in
Manchuria. In June, sixteen more new divisions were raised.

Paul

Padraigh ProAmerica

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Apr 18, 2012, 6:08:10 PM4/18/12
to
By October of 1944, the Japanese Merchant Marine was in a shambles an
unable to do much of anything worthwhile.

--
"A good march should make a man with a wooden leg want to step out."--

John Phillip Sousa

Alan Meyer

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Apr 19, 2012, 12:12:14 AM4/19/12
to
On 04/18/2012 02:14 PM, Rob wrote:

>...
> Anybody have a sense of how many aircraft were transferred?
> ...

I can't find the citation any more but I read a book about the air war
over Japan that claimed that some months before the end of the war the
Japanese air force stopped contesting the air space over Japan. They
were short on pilots and fuel and didn't want to lose what they had to
attrition. All of their newly produced aircraft were put into caves or
other hideouts to be used as kamikazes against the expected invasion.

One effect of this was that bombing Japan became something like flying a
scheduled air service. Take off, fly to the destination, drop the
bombs, fly back. There was some flak to deal with but no fighter
opposition and no real need for guns or escorts.

Another effect was that a pretty large air reserve was built up to
oppose the invasion. I seem to recall that they had 5,000 planes
squirreled away. If so, they probably wouldn't have needed air units
from China.

Alan

Michael Emrys

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Apr 19, 2012, 10:37:43 AM4/19/12
to
On 4/18/12 9:12 PM, Alan Meyer wrote:
> ...some months before the end of the war the Japanese air force
> stopped contesting the air space over Japan. They were short on
> pilots and fuel and didn't want to lose what they had to attrition.
> All of their newly produced aircraft were put into caves or other
> hideouts to be used as kamikazes against the expected invasion.

I don't recall the numbers he uses, but Robert B. Frank in _Downfall_
reports essentially the same thing.

Michael

a425couple

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Apr 22, 2012, 1:43:05 PM4/22/12
to
"Rob" <raharr...@my-deja.com> wrote in message...
- How many troops and how much equipment did Japan ship
> from the mainland to the home islands in 1945?
>
> Is there a breakdown of troop transfers by month within 1945, ie, how
> many troops were moved in August 1945, July 1945, June 1945, May 1945,
> April 1945, March 1945, etc.

I have not found the above.

> Was "operation starvation", the aerial mining campaign supplementing
> the submarine blockade, sufficient to stop all significant troops
> transports from the mainland to Japan in the summer of 1945?

AIUI - all truly "significant" was stopped.

> Anybody have a sense of how many aircraft were transferred?

AIUI - very few.

> I believe US intel during the war detected a Japanese division moving
> from Manchuria to Kyushu in April 1945.

>From one cite:
http://www.wwiihistorymagazine.com/current-issue/Jun09/kyushu.html
"It was also believed that Japan's best troops were brought home
to defend against invasion. Except for a few divisions that transferred
from Formosa and Manchuria (two former Manchurian divisions were
on Kyushu), Japan's deployed military forces remained overseas throughout
the war. Although there were an estimated five million men in the Japanese
military at the end of the war, less than half were in the Home Islands"

Actually, in this instance, I was quite pleased with the
results of my computer search!
I googled = Japanese division Manchuria Kyushu 1945
and got a whole bunch (page 1 reprinted here/below)

WWII History Magazine - July 2009 - Costly Kyushu Invasion?
www.wwiihistorymagazine.com/current-issue/Jun09/kyushu.html
The report of those interrogations was published on December 31, 1945, but
was ... Consequently, only four divisions of the Imperial Japanese
Army-roughly ... and Manchuria (two former Manchurian divisions were on
Kyushu), Japan's ...

The Final Months of the War With Japan - Central Intelligence ...
www.cia.gov > ... > CSI Publications > Books and Monographs
b This was the division that had recently been moved from Manchuria. This
table is ..... Estimated Japanese Dispositions on Kyushu, 9 July 1945. [Top
of page] ...

Japan 1945: From Operation Downfall to Hiroshima and Nagasaki - Google Books
Result
books.google.com/books?isbn=1846032849...
Clayton K. S. Chun, John White - 2008 - History - 96 pages
In the early summer of 1945, little was known about the quality of enemy
opposition. ... 1945 the IJA would have three combat divisions in southern
Kyushu and ... well as depot divisions, forces primarily transferred from
Manchuria and Honshu.

The Japanese army 1931-45: 1942-45 - Google Books Result
books.google.com/books?isbn=1841763543...
Philip S. Jowett, Stephen Andrew - 2002 - History - 48 pages
MANCHURIA & JAPAN, 1945 The Kwangtung Army The Kwangtung Army which ... From
February 1944 the Kwangtung Army had seen 12 of its divisions ... invasion
of the southern Japanese island of Kyushu, code-named 'Olympic', was ...

Operation Downfall 3: Allied Intelligence
www.historyofwar.org/articles/wars_downfall3.html
Operation Downfall: The planned invasion of Japan in 1945. ... to move a
combat division from Manchuria to Kyushu as well as troop transfers from the
Kurils.

We, the Japanese people: World War II and the origins of the ... - Google
Books Result
books.google.com/books?isbn=0804734542...Dale M. Hellegers - 2001 -
History - 826 pages
Army G-2 estimated that by September 1945, the Japanese would be able to
transfer six infantry divisions from Manchuria and China to ... United
States was invading Kyushu, the Japanese would not divert aircraft from
Manchuria and China.

Operation Downfall - Wikipedia, the free encyclopedia
en.wikipedia.org/wiki/Operation_Downfall
Outcome, Canceled after Japan surrendered in August 1945.... (3) hostile
divisions will be disposed in Southern KYUSHU and an additional three (3) in
... the Imperial Japanese Army transferred forces from Manchuria, Korea,
and northern ...

Defense of Japan 1945 - Google Books Result
books.google.com/books?isbn=1846036879...Steven J. Zaloga, Steven Zaloga,
Steve Noon - 2010 - History - 64 pages
THE SITES IN BATTLE The US plan in the spring of 1945 was to launch a
two-pronged ... would hit southern Kyushu on "X-Day," November 1, 1945 with
14 divisions. ... and Nagasaki and the Red Army invaded Manchuria in August
1945.

The Japanese Plans for the Defense of Kyushu
www.alternatewars.com/WW2/Downfall/Jap_Plans_Kyushu.htm
31 December 1945. THE JAPANESE PLANS FOR THE DEFENSE OF KYUSHU. By the end
of July 1945, sufficient information was available for the G-2 to make ...

Casualty Projections for the Invasion of Japan; Kyushu, 1945; Truman
home.roadrunner.com/~casualties/
by DM Giangreco - Cited by 21 - Related articles
Casualty Projections for the U.S. Invasions of Japan, 1945-1946: ....
Attached to the Armies in <page 528> Manchuria During the Russo-Japanese
War, ... is generally realized, with division-sized units in contact with
the enemy from October ...

Also, pages 2 & on have many 'meaty' pieces.

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