All the furniture in the courtroom, hotel and restaurant sets were custom-built replicas made by the art and construction departments for use on the production in order for everything to look authentic.
The Imperial Hotel, designed by Frank Lloyd Wright, was originally located in Tokyo opposite the Imperial Palace. While most of Wright's building was destroyed during WWII, the iconic central lobby wing and the reflecting pool were disassembled and rebuilt near Nagoya in the Meiji-Mura outdoor village museum. Filmmakers gained access to shoot a portion of the production on this historic site.
Two of the twenty-eight war criminals on trial died during the course of the legal proceedings. One was declared mentally unfit to stand trial.
Japanese prime minister Hideki Tojo was executed on December 23, 1948. Before his execution, he gave his final statement and apologized for the atrocities committed by the Japanese military and urged Americans to show compassion for the Japanese people who had suffered devastation from the atomic bomb attacks.
The trial itself lasted two and a half years. Comparatively, the Nuremberg Trials only lasted 11 months.