The 19 30s is a period of growing global anxieties. The japanese are not doing themselves any favors, because they may not officially be fachost but they sure do play nicely with them. This era provides some frosting on the top of a very tall, multi layered japanese cultural cake.
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.