Also, anyone know what time the NRT opens? Do you guys think I could skip the hotel and come back to NRT as soon as it opens from Tokyo? Call me crazy, I'm thinking of seeing Tokyo as much as possible within 23 hours (without sleeping) when I'm there. Besides, I'm flying Business to SIN (7 hours flight) so guessing I can sleep on the plane. Thanks in advance.
Remember public transit pretty much stops operating between the hours of midnight/1am through 5am. So during that period you are essentially stuck in one area of Tokyo, unless you walk or pay for upcharged taxis to get around at those hours.