The government of japan during the late twenties, early thirties is a government by assassination. The assassins are members of groups that want to go ato a golden age that never existed. They loathe parliamentary democracy and all its vile politicians who are corrupt. If they get what they want, there's going to be an expansion of japanese power in manchuria,. then a confrontation with the soviet union.
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.