WORLD WAR P!!! Who's leading you?

I'm not sure, but I'm pretty sure it was Tokyo they targeted.

I think there was a reason.

It wasn't because of evilness, you yourself mentioned Pearl Harbor. At times of war, that would have been a good retaliation.

Apparently, it was planned to stop the US from advancing into southeast Asia, so it was smart military startegy.

this was seventy years ago. The idea was, "Hey, we have bombs now, let's use them. Who cares about negotiating?" The US also was a strong military, which was a threat and Japan likely didn't want to risk it.