How to legally stop conspiracy agreements, pacts

With Japan's new centre-left government lifting the veil of secrecy surrounding nuclear and military deals struck with the United States during the Cold war. This policy shift points to a new era of how to  legally stop conspiracy agreements, pacts that were formed through decades of denials during the Cold War. Space Daily is reporting on their website that the US government is downplaying Japan's inquiry into nuclear weapons transiting and even being stored on Japanese soil, despite Japan's anti-nuclear policy.

It can be spun that the US transiting nuclear material through Japanese territory is the lesser of two evils, since Japan relies on US nuclear deterrence. The only alternative would have been Japan developing it's own nuclear weapons. An overt affront to their anti-nuclear and pacifist constitution.  It is not sufficient to claim self-defense as the primary reason for the possession of nuclear weapons, regardless of their pacifist rhetoric. So why is Japan's government stirring the pot on the nuclear debate? Could this be playing on the Obama administration's negotiations with Russia over nuclear disarmament? Fooling Moscow into believing that the world is gravitating towards a WMD free world. Replaced but one dominated by high tech conventional and unmanned weapons? Technology in which Russia lags seriously behind other developed nations?  Only time will tell.