You assume they have a missile that can get through the shield and hit with enough power and accuracy to cause a melt in the containment vessel.
Nay, their deterrent is a nuke on Seoul. And they count on the South refusing the US permission.
What they do not realize is the US will put its interests above that of the South, or even Japan, and strike hard and quick.
We must eliminate the threat to the US.
"You assume they have a missile that can get through the shield and hit with enough power and accuracy to cause a melt in the containment vessel."
Yes, courtesy of China/Russia (Rabbit hole goes deep, why did Putin order an evacuation in/around Vladivostok on August 28) and the fact that Takahama is not the most stable nuke plant around. That place goes, then the jet stream makes sure most of Japan gets a radioactive "bath".