A man of stronger personality than Hirohito might have tried more strenuously to check the growing influence of the military ... and the drift of Japan toward war. John Whitehead, Britain’s former ambassador to Japan, upon release of documents. Source South China Morning Post
Hirohito and the Making of Modern Japan by 
Showa 1926-1939 by 
A Concise History of Japan by 
A History of Japan by 
A History of Japan by 
The Japanese Empire by 
Conflict in the Pacific 1937-1951 by 
Contested spaces: Conflict in the Pacific
Hirohito at his enthronement 1928 (Wikimedia Commons)
Crown Prince Hirohito, 1921, (acting ruler of Japan). Image by Vandyk. National Portrait Gallery, London. Creative Commons licence by-nc-nd/3.0
"From early boyhood he had been educated in both Confucian and idealized samurai values." Herbert P. Bix
History Reference Centre Database. Search for HIROHITO or SHOWA.
Encyclopedia Britannica. . Search in the HIGH level for Japan -- History -- Rise of the militarists.
JSTOR - look for journal articles - search terms may be HIROHITO; IMPERIAL JAPAN; JAPANESE MILITARISM.
See from Chapter 8 (22 mins in) for information about Taisho and Showa emperors.