What does Emperor Hirohito's statement during his surrender speech reveal about the impact of nuclear weapons?

It revealed that nuclear weapons were immensely powerful and the most willful warriors were still vulnerable to it.

Explanation:

The introduction of nuclear weapons meant warfare would never be conducted the same way again since, a nation with such weapons could use them to destroy any army no matter how well trained or armed. They would be used anywhere that was considered a high threat and even on civilians if need be.