Japan attacked us without warning.
We went to war and warned them to cease or we would drop that bomb.
We rather than lose a hundred thousand American troops dropped bomb number one.
We then said that they should surrender or we drop bomb number two.
They did NOT surrender and we had to drop number two.
They surrendered, we spent 50 years in Japan turning them around and now they are our friends.
The Japanese also sell us Nintendos and Cell phones, now.