As someone that's spent quite a bit of time in both I can honestly say... I didn't vote.
Greetings -- new guy, all that. Nice to meet you.</formal greeting>
I've just moved to Hawaii. Not the worst place in the world, as we still work the Asian hours (1PM to 9PM) so I can surf/go to the beach every day if I really wanted to. It's a good gig, BUT...
Here's a very impersonal list of what I've found as pros & cons of both places.
US: Pro
-------
-Banks (ATMs are 24 hours -- no questions asked)
-Actually something good on TV. Yeah, I know it's "junk TV" but TV in Japan is so horribly laughable.
-A fraction of the cost (even Hawaii is cheaper than Japan)
-Much more personal (you can talk to people you don't know)
-Not everything is endorsed by a cute, fuzzy critter
-No language barrier (except for Hawaii, apparently)
-Pizza (and Mexican food in the South) done right
US: Con
--------
-Banks (remittance takes an act of God and $$ to do)
-Checks (2004 people -- time to get off the paper)
-EXTREMELY hard not to get fat
-The whole world hates us
-Loud Americans
-Agendas
-Chips on shoulders
-Professional laziness, for lack of a better word.
-Your wife might nag about living in a country w/ Dubya as the President
Japan: Pro
----------
-Banks (all bills automatically deducted from bank account -- you only get a receipt!)
-Safe (my wife can go get milk at 2AM, and I won't stop her!)
-Convenient
-No need for a car in most cities (you can booz up anywhere, and run 0-risk of a DUI!!!)
-No last call
-4 very distinct seasons
-Scantily clad women (real ones too -- not just drawn!)
-Work ethic (believe me -- you'll take this for granted)
-You will be profusely praised for your "great Japanese" even if it sucks
-Police really aren't that bad -- no Rodney King incidents yet.
Japan: Con
----------
-Banks (most ATMs are not 24 hours, and you can't use just any ATM)
-Prohibitively expensive. Not as bad as it used to be, but still pricey.
-TV is really bad
-The act of moving there is a multi-step disaster, especially if you don't know anyone, nor have a job...specifically finding a place to live.
-Limited job fields for non-Japanese (but there are quite a few jobs to had)
-Seniority-based pay scale (sucks if you're young)
-Recession
Wow... that got really long.
I guess for the next few years, the states.