These links describe Isoroku Yamamoto, Japanese admiral during World War II.

Biography: Yamamoto
Good, basic biography of the Japanese admiral during the war.

Isoroku Yamamoto
Excellent site includes lots of detail, with a focus on WWII.

10 Things You Never Knew about Isoroku Yamamoto
Interesting details here

Pearl Harbor
Learn more about the Japanese attack that brought the U.S. into the war.

The Battle of Midway
Learn more about the naval battle that turned the tide of the Pacific war in favor of the United States.

World War II in Asia and the Pacific
The attack on Pearl Harbor was just the beginning. Find out how and why Japan and the U.S. clashed in Asia and the Pacific.