I think it's time for Japan to step up to the plate and do something about it. They need to revise their constitution. That era is over.
I don't disagree with the sentiment behind your post, but I do think it's clear that China is going to spark nuclear proliferation beyond our wildest dreams.
I'm not convinced that China didn't help North Korea, and I wouldn't be surprised to find out that it's sticky fingers were involved in Iran's program as well.
Russia and possibly China too, are messing with wildfire in Iran. This could come back to haunt them as much as the west, when Iran desiminates it's knowledge to terrorist groups.
How would Russia like to mop up after terrorists nuke one or more of it's southern cities off the face of planet earth?
Are they so blind that they don't understand what this threat could mean to them?