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Isoroku Yamamoto was born on April 4, 1884 in Nagaoka, Niigata, Japan. He was a Japanese admiral who served as Commander-in-Chief of the Combined Fleet from 1941 to 1943. He is best known for planning and executing the attack on Pearl Harbor on December 7, 1941. Yamamoto was killed in action on April 18, 1943, when his aircraft was shot down over Bougainville Island.