Edward J. Drea, In the Service of the Emperor : Essays on the Imperial Japanese Army, University of Nebraska Press, 1998, 299 p. (ISBN 0-8032-1708-0), « Japanese Preparations for the Defense of the Homeland & Intelligence Forecasting for the Invasion of Japan »
Frank Richard B, Downfall : The End of the Imperial Japanese Empire, New York, Random House, 1999, 484 p. (ISBN 978-0-14-100146-3)
John Ray Skates, The Invasion of Japan : Alternative to the Bomb Downfall, New York, University of South Carolina Press, 1994, 276 p. (ISBN 0-87249-972-3)