In japanese history, this is the period where that sky rockets. And you will see a number of major figures, not just political figures, but also corporate ones, guned down. How about the one in 19 32 where 11 naval cadets from a faction in navy wants a military dictatorship and a return to the emperor and the golden age? The people who kill the prime minister release a manifesto which shows the depth of emotional anger experienced by these people.
The Asia-Pacific War of 1937-1945 has deep roots. It also involves a Japanese society that's been called one of the most distinctive on Earth. If there were a Japanese version of Captain America, this would be his origin story.