I have no doubt that the Japanese have the technological skill and the money to have nuclear weapons if they so wished. If Pakistan can manage this then it should be childs play for a country such as Japan.
On the one hand I can see how any country (especially Japan considering its wealth and importance in the world) would want nuclear weapons. Not to start a war so much as to tell any potential invader that attacking them is a REALLY bad idea.
In the other hand the Japanese have the dubious distinction of being the only country in the world to have nuclear weapons used against it. I believe the national psyche has a feeling of ‘nukes are VERY bad’ and that the general populace would be really upset to find that their country possessed such weapons.
Any ideas anyone? I’m not asking for any real reason (not the sinking of their fishing boat). Just curious.
Oh yeah…one other possibility I can think of:
Japan doesn’t have a nuclear bomb assembled but they have all of the pieces to build one very fast. You know…some plutonium over at that university for research. A rocket in a silo somewhere else used for space research. Some highly accurate explosives for ‘demolition’ work. And so on…
In this fashion they can walk around and say, “Nope…no nuclear weapons here.” But, in a pinch, they could whip one together in short order (a day or two). No good to discourage a preemptive nuclear strike against them (that’s what the US is for) but certainly enough to keep a foreign army thinking twice before they invade.