The Imperial Japanese Army (IJA) iterally “Army of the Greater Japanese Empire”, was the official ground-based armed force of the Empire of Japan, from 1871 to 1945. It was controlled by the Imperial Army General Staff Office and the Ministry of War, both of which were nominally subordinate to the Emperor of Japan as supreme commander of the army and the navy. Later an Inspectorate General of Military (Army) Aviation, became the third agency with oversight over the army.
Very informative extract from Wiki. http://en.wikipedia.org/wiki/Imperial_Japanese_Army
I doubt anyone on this site would have been aware of any of that, and other arcane matters such as what IJN stands for, and why Nippon can be rendered as Nihon.
We are indebted to you, Numb Nuts.