Japan's 1941 war decision and deterrence

If Admiral Osami Nagano had openly said Japan had only a short-lived chance against the United States, would Japan still have gone to war in 1941?

The panel thinks a warning would probably not have stopped advocates who already regarded peace as defeat, and even raises a risk to Nagano himself; an alternative to capitulation or war would matter more in this interpretation.

The counterfactual asks whether a frank warning about Japan's poor chances could have prevented war. The reply argues that advocates of war already regarded continued peace under economic pressure as defeat, making even a narrow chance of victory attractive to them. It also raises the possibility that an outspoken warning would lead to Nagano's assassination. That reasoning concerns the outlook of those pressing for war, rather than a claim that every Japanese leader shared it. A hypothetical Dutch fuel-supply arrangement is offered as an example of an alternative that could have changed the perceived choices. It is a counterfactual illustration of deterrence, not an account of an arrangement that actually operated.