I'm now well over 24 hours with no sleep (NO SLEEP!) and I'm back in the Tokyo airport after a day spent wandering around the surprising and very charming small city of Narita.
I took in a temple, ate some broiled eel (a local specialty) while men a few feel away from me cut the heads off live ones and cleaned them at the front of the restaurant to bring in customers (it worked; the place had a line down the block) and drank a lot of wonderous green tea.
(Side note: It's coooold in Japan in January--all I had was a sweatshirt and a sarong worn as a scarf.)
Now I just have to survive another flight and two trains. Eek.