First he was captured in a small bunker underground Although I'm not sure what they did with him after that
<span />
Emphasis on reason as the means of discovering truth.
Answer:
He did it to show the American power. He also canceled the trading between Japan and them (stop giving them the neccissary oil that Japan needed for the military). Japan resolved the problem through diplomacy while at the same time, planning attacks, especially on Pearl Harbor. The leader of Japan thought that having a surprise attack on the United States would give time for Japan to consolidate.
