How daring must be a film studio to make a film applauding the acts of the Japanese Empire not only for the local, but the global market as well. One of the ways to do it, is to make a documentary, use objectivity as a shield for political play. Alternatively it can be about the individuals, who were concerned about the life of brethren than some pity war goals.
It could be said war and comedies don't work well together. How can anything humorous be said about the matters. Those who do must have lost their minds from the war! Cracking jokes and grinning while speaking of most horrific events in human history like it were a regular Friday night, is one of the best ways to come with the trauma. The trauma which never heals, always stays where-ever the eyes turn. Telling a story really helps get the pain off the chest. In a way, Westward Desperado is exactly just that.