Japanese Army Type 2 antiaircraft Machine cannon
２式20mm高射機関砲（走行姿勢）
As of August 11
Move posture
A Japanese army anti-aircraft gun is unearthed from the underground of the construction site in Haneda Airport.
(June 7, 2007)
羽田の高射砲　時事通信
From the terminal construction work site in Haneda Airport (Ota-ku, Tokyo), the anti-aircraft gun was found by July 6.
A Japanese army uses the Ministry of Land, Infrastructure and Transport Tokyo Civil Aviation Bureau Tokyo airport office which manages this airport,
and it supposes that a possibility of having been abandoned just behind the end of the war is high.
According to this office, the anti-aircraft gun was buried with a form which was crushed near about 2m of underground.
Although corrosion was progressing considerably by metal, about 2m Barrel was attached.
There were some which are believed to be a plinth made from concrete. 　　　　　　　　　　　　　　　　　　　　　　　　　　　 　（A report and photo: Jiji Press）
The anti-aircraft gun discovered in the construction site in Haneda Airport reported in various newspaper publishing companies etc.
is Type 2 antiaircraft Machine cannon or Type 2 antiaircraft Machine cannonSystem.
２式高射機関砲（右）
↑↓Type 2 antiaircraft Machine cannon of a shooting posture.
２式高射機関砲（左）
Type 2 antiaircraft Machine cannon was a copy of Flak 30 in Germany.
A machine cannon was Japanese type 98 machine cannon, The part is changed into Japanese specification.
Development started in 1941, start of production in 1944?.

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