Japan is fine, unless China gets pushy and tries to take back some islands to the south (Not sure of the names).
Taiwan on the other hand might have issues in the coming years. China wants Taiwan back pretty bad. And if you look at a map it's RIGHT off the China coast.
As far as China having certain moral responsibilities because of it's world status...not sure about that.
Look at us, the United States. We, in general, think of ourselves as world leaders, with high morals, fighting for freedom. But if you take a look from another perspective you see we have more people in prison than any other country. And, I'm sure our armies have killed more people than any other country in the world in the past 10 years as well. So, are we the good guys or the bad?
I think it is all about point of view.