You might be interested in some previous questions on Emperor Hirohito and the post-war trials:

Why wasn't the Emperor put on trial?

• After the Empire of Japan's defeat in WW2, why wasn't Emperor Hirohito put on trial for war crimes? - 3 comments, over 12 months old.

• The comments in this thread are filled with sources and analysis of the political situation in Japan, in the United States, and amongst the Allies with regard to post-war Japan as well as American plans for the Emperor in the post-war world.

• Why wasn't Emperor Hirohito tried for war crimes following WWII, and what reasons did General MacArthur have for steering things this way? - 4 comments, over 1 year old.

• The topmost comment is an analysis of a US internal government document detailing plans and reasoning for policy in post-war Japan.

How involved was the Emperor in Japanese politics and militarism?

• Why wasn't Emperor Hirohito tried at the International Military Tribunal for the Far East after WWII? Why did the Allies let him stay "in power?" - 4 comments, over 1 year old.

• This thread summarizes the general level of involvement that the Emperor had in Japanese military operations and activities throughout World War II.

• To what extent was Emperor Hirohito aware of the operations of Unit 731? - 5 comments, over 4 months old.

• A commenter in this thread goes into specific interactions that the Imperial family had with Unit 731 and related administration.

• How did post-occupation Japan view Hirohito and were there large groups still loyal to him? - 41 comments, over 1 year old.

• Commenters in this thread explore a variety of aspects of Emperor Hirohito, from the way his surrender speech sounded to the masses to extent of his involvement with Japanese politics and expansionism.

Related Threads

• When the U.S. forced Emperor Hirohito to renounce his divinity following WWII, did this renunciation have any immediate affect on the Japanese psyche and does the notion of Japanese and specifically Imperial divinity persist to any degree today? - 2 comments, over 8 months old.

• A commenter in this thread analyzes the place of the Emperor through the concepts of divinity in Shinto-ism (Japanese religion).

• How did Americans react when they learned that Hirohito would not only escape prosecution but also keep the throne following WWII? - 73 comments, over 8 months old.

• Commenters in this thread briefly touch on the question and then discuss post-war policies in Japan such as the rise and fall of a government-endorsed prostitution system.

• Immediately after World War II, was there a real likelihood that Japan could have fallen under the Iron Curtain without U.S. occupation/leadership? - 28 comments, over 4 months old.

• The topmost comment talks about the presence of socialist and communist organizations in Japan during the war and post-war period and other top level comments deal with the practical aspects of Soviet invasion of Japanese territories.