I agree with Kevin; great discussion by two pillars of our aikido community.
I have a couple thoughts.
I don't feel an obligation to give anything back to Japan. I do feel an obligation to give something back to society, whether it be Japanese, American, Mexican, etc., but mostly I feel an obligation to give back to the community in which I find myself at the moment.
While I may speak of principals of aikido while not in the dojo, I do not think that sharing principals of aikido outside of the dojo is very meaningful or useful. It just feels too 'out of context' for me.
Apologies for the Interruption. Back to the pillars.