This presents an overview and excerpts from the book, "Inconvenient Truth: Lessons from Japan's 1941 Defeat Prediction," which details the findings of the Total War Research Institute established by Japan before World War II.

This research body, composed of young elites, conducted a comprehensive simulation in 1941 that scientifically predicted Japan's eventual defeat against the United States due to vast national resource differences and the inevitable collapse of sea lanes. However, it explains that this "inconvenient truth" was suppressed by military and government leaders, most notably Hideki Tojo, who favored unfounded spiritualism and organizational conformity over objective, data-driven analysis.

It emphasizes that this historical failure to confront reality provides critical lessons for modern business and organizational decision-making, underscoring the necessity of respecting objective data, tolerating diverse opinions, and defining clear exit strategies.