The nuclear bomb was more shocking to everyone in Japan.
See atomic bombings of Hiroshima and Nagasaki
See: Atomic bombings of Hiroshima and Nagasaki
It was not a disaster and had nothing to do with nuclear energy. These are the dates of the Atomic Bombings of Hiroshima and Nagasaki respectively that ended WW2.
They feel not too bad but some real want REVENGE
There has not been nuclear warfare. There have been two nuclear attacks. Nuclear warfare denotes the use of nuclear weapons by both or all opposing sides. The only use of nuclear weapons in warfare were the two bombings by the US of Hiroshima and Nagasaki, and it was the intent of the US to bring WW2 with Japan to a quicker conclusion.
If you are referring to nuclear bombings, and by "countries" you mean "cities" that would be Hiroshima and Nagasaki.
The Chernobyl nuclear disaster released an estimated 400 times more radiation than the atomic bombing of Hiroshima and Nagasaki. It is difficult to quantify the exact amount of radiation released, but it is estimated to be around 100 times more than the combined releases from the atomic bombings and the Fukushima nuclear disaster.
Ended the war without killing a million Allied soldiers. Killed a lot of Japanese and began the "nuclear age".
No. That was what led to the crisis. The crisis was that Russia was putting some nuclear missiles in Cuba as a deterrent to the bombings.
I could be completely mistaken, but I don't think the US had any ground troops in Japan at the time.
Nagasaki , Japan edit: If you consider test bombings, Hiroshima, Japan was actually the second place to be bombed after the Trinity nuclear test.