Happy belated, mistarpanda!
Seems like the general consensus is for you to not return to the states yet; either stay in Japan or move to another country for a bit first. What do you think?
I don't feel like I'm in any position to try and influence your living plans. I'm younger and have even less experience to draw on to dispense words of wisdom. ^_^ However, I will say that if given the choice myself, I'd choose to travel some and see where I fit in.
Will you regret it terribly if you don't stay in Tokyo? Do you badly want to explore a different part of the world? If so, and if you do choose to move to the city, would you be willing to uproot yourself again to go somewhere else?
At the end of the day, none of them are "wrong", really; just not what you want most at the moment, perhaps. Good luck with the decision process. :)
Cheers!
tchamster