Once again I agree Charles the Hammer
I don't think it is necessary for the Japanese to acquire nukes but just talking about it might get the PRC to rethink their uncritical support of North Korea.
North Korea and China actually have very little in common; or so it appears to me. I think the reason the PRC continues to support the North Koreans (Norks) is a combination of inertia, they always have, and because the Norks are useful as a foil that keeps the US from looking to closely at what goes on in the PRC.
But, given their obvious Neo-imperialist intentions I think the leaders of the PRC would give up the Norks rather than deal with a nuclear Japan that probably has four times the economic muscle of the PRC and infinitely more technological know how.
If Japan decides to acquire nuclear weapons as a result of the Nork program then the situation would be transformed from being a neuralgic problem for the US to a neuralgic problem for the PRC.
Anything that gives the leaders in Beijing a pain in the butt is probably a good thing
Until Next Time
The Blogger who knows what the word "neuralgic" means