The International Military Tribunal for the Far East (IMTFE, also the Tokyo Trial and the Tokyo War Crimes Tribunal) was a military trial convened on 29 April 1946 to try leaders of the Empire of Japan for their crimes against peace, conventional war crimes, and crimes against humanity, leading up to and during the Second World War. The IMTFE was modeled after the International Military Tribunal (IMT) at Nuremberg, Germany, which prosecuted the leaders of Nazi Germany for their war crimes, crimes against peace, and crimes against humanity.

Following Japan's defeat and occupation by the Allies, the Supreme Commander of the Allied Powers, United States General Douglas MacArthur, issued a special proclamation establishing the IMTFE. A charter was drafted to establish the court's composition, jurisdiction, procedures; the crimes were defined based on the Nuremberg charter. The Tokyo War Crimes Tribunal was composed of judges, prosecutors, and staff from eleven countries that had fought against Japan: Australia, Canada, China, France, India, the Netherlands, New Zealand, the Philippines, the Soviet Union, the United Kingdom, and the United States; the defense consisted of Japanese and American lawyers.

The Tokyo Trial exercised broader temporal jurisdiction than its counterpart in Nuremberg, beginning from the 1931 Japanese invasion of Manchuria. Twenty-eight high-ranking Japanese military and political leaders were tried by the court, including current and former prime ministers, foreign ministers, and military commanders. They were charged with fifty-five separate counts, including the waging wars of aggression, murder, and various war crimes and crimes against humanity (such as torture and forced labor) against prisoners-of-war, civilian internees, and the inhabitants of occupied territories; ultimately, 45 of the counts, including all the murder charges, were ruled either redundant or not authorized under the IMTFE Charter.

By the time it adjourned on November 12, 1948, two defendants had died of natural causes and one, Shūmei Ōkawa, was ruled unfit to stand trial. All remaining defendants were found guilty of at least one count, of whom seven were sentenced to death and sixteen to life imprisonment. Thousands of other "lesser" war criminals were tried by domestic tribunals convened across Asia and the Pacific by Allied nations, with most concluding by 1949.

However, imperial Japanese leaders responsible for some of the worst war crimes committed in WW2 were not punished. Due to the US government covering up some Japanese war crimes and classifying incriminating evidence, as well as blocking the prosecution access to key witnesses, the trials failed to bring imperial Japanese leaders responsible for Unit 731 to justice.

The Tokyo Trial lasted more than twice as long as the better-known Nuremberg trials, and its impact was similarly influential in the development of international law; similar international war crimes tribunals would not be established until the 1990s.