Hideki Tojo was a Japanese politician, military leader and convicted war criminal who served as prime minister of Japan and president of the Imperial Rule Assistance Association from 1941 to 1944 during World War II. He assumed several more positions including chief of staff of the Imperial Army before ultimately being removed from power in July 1944. During his years in power, his leadership was marked by extreme state-perpetrated violence in the name of Japanese ultranationalism, much of which he was personally involved in.