While reading about Sino-japan war.I found Japan was almost winning.Suddenly it attacked Perl Harbor.I could not find the motive.What Google search gave a result with details explanation. [ ](http://www.blogger.com/goog_1289666394)[http://wiki.answers.com/Q/Why\_did\_the\_Japanese\_attack\_Pearl\_Harbor](http://wiki.answers.com/Q/Why_did_the_Japanese_attack_Pearl_Harbor)