Post-war studies suggest that Japan simply didn't have the resources to sustain the war of attrition it had gotten into. So its leaders had to rely on the fervent morale of its citizens in order to keep a handle on the worsening situation.
戰後對日本的研究認為，當日軍陷入長期的泥沼戰以後，日本島國可動用的資源有限，主政者須仰賴高昂的民心士氣，以支撐日益見絀的局面。