According to the article
“Japan is the only country in the world that has been hit by atomic bombs. It has a deep memory of this from the government down to the people,” a transcript of one of the videos reads.
“Nuclear deterrence against Japan will get twice the result with half the effort.
“By singling out Japan as an ‘exception’ to our commitment not to use or be the first to use nuclear weapons, we are warning Japan and informing the world that if Japan interferes militarily in our domestic affairs – including the unification of Taiwan with the mainland – nuclear weapons will surely be used against them.
“They will be used continuously until its unconditional surrender. There will be no peace talks.”
I agree, once japan declare it will interfere in taiwan, NFU should not be applied to them
It also a great way to ensure that usa never placed nuclear weapons on japanese soil
Article below explain this logic
"Japan’s new “
forward defense” posture, where it would fight China in Taiwan to preserve the sovereignty of the Senkaku Islands, however, appears to put nuclear weapons back into the equation, and not at the initiative of the United States. Moreover, if China is serious about the “Japan Exception Theory” (and there is
no official statement from the Chinese authorities suggesting for a moment that they are), then a nuclear conflict will automatically be triggered by any Japanese military intervention on behalf of Taiwan.
In short, the US is no longer in control of how and when it would use its nuclear arsenal. Japan is."