Japan will soon revise their stand on nuclear weapons.
I'd like to see that, too. Japan's population is simply too concentrated and vulnerable for them to ever fight an agressive war that they wouldn't quickly loose (it would be WW2 all over again for them) but I'd love for them to have a doomsday arsenal able to keep the Chinese and North Koreas out on their own.
My understanding is that a position paper has already been released some time back, whereby Japan could be nuclear within 90 days of formal government approval. Essentially, the ducks are already in a row, contingency plans exist, and all that's missing is the t's needing crossing, and i's dotted.