Chūichi Nagumo
The "Kidō Butai" (also known as the "Carrier Striking Task Force") set sail from Hitokappu Bay, Japan under Vice Admiral Chūichi Nagumo on 26 November 1941, arriving in Hawaiian waters on Sunday, 7 December 1941 Hawaiian time. At around 8am, the first wave began its attack on the US Pacific Fleet based at Pearl Harbor and on outlying airfields. By the end of the day 21 American ships were either sunk or crippled, 188 aircraft were destroyed, and almost 2,500 Americans were killed. Japan was now formally at war with the United States.