Ack Ack I don't buy that revisionist romanticized view of them. Calling them the "elite" is also a laugh. While one or two notable people performed it (and were used as martyrs by the Empire afterwards to promote it) the majority (note I said "most") were untrained and rushed through training.
Just like the Soviet Union did to its civilians pushed into the ground war, and just like North Korea does today, they were brainwashed in a total environment of lies and fanaticism.
Why do you think terrorists recruit at college campuses in the US for the past 50 years? Radicals, extremists all over the world also look for the young and naive, those looking for a path.
You got 2 paths: religion and teenagers in college.
In Japan the religion wouldn't fly (a la US cults, sects, etc), so the next step before marching mom and pop from the fishing villages to the meat grinder was to see how many they could dupe, con, or conive into doing it before rounding them up at gunpoint.
It's been seen many times in history, and repainting it as heroic is just an abuse to the greater truth: These folks were bred into ignorance, servitude, and had no options or hope.
EDIT: Disclaimer: Ignorance does not denote lack of education. One can be taught physics, math, and still be totally ignorant of the world and of their potential as human beings.