Imperial Japanese Navy Air Service Pilots with a Nakajima J1N1 Gekkō ("Moonlight") twin-engine aircraft used for reconnaissance, as night fighter, and for kamikaze missions. Second from the left – the famous Satio Endo, - who shot down 8 and damaged 8 American Boeing B-29 Superfortress bombers; Circa 1943-44.

Imperial Japanese Navy Pilots

Japanese 37-mm Type 94 cannons and infantrymen in battle near the Khalkhin-Gol River. June 28, 1939.  
   The Battles of Khalkhin Gol were the engagements of the undeclared Soviet–Japanese border conflicts fought among the Soviet Union, Mongolia, Japan and Manchukuo in 1939. The conflict was named after the river (Khalkhin Gol), which passes through the battlefield. 

Japanese-Soviet border clashes

The tail gunner of a Japanese Mitsubishi G4M2 “Betty” bomber is equipped with a Type 99 20mm cannon.