It's definitely not something commonly talked about in cartoons or comics or novels (the most recent series I can think of would be Tokyo Raven! Volume 16) but the topic of Japan becoming drunk off the successes of 1939-41 has been mentioned, and explored in how the military and the populace deceived themselves and everyone around themselves
On the other hand, regardless of whether it was the right choice or the wrong choice or the dumbest choice, judging the act of going to war is almost completely unknown when it comes to mangaka and novelists. The conduct of the war is a different story.