Singapore and Hong Kong
Brand-new Boeing 787 Dreamliner for the flight to Tokyo's Narita airport. While United's Economy still isn't the nicest, at least in Economy Plus the legroom is okay, and the in-flight technology about matches up with Cathay Pacific and their other competitors. The bigger windows (with built-in dimming) and better cabin pressurization are nice, too.
Sadly the amount of content available for viewing is still lacking (although the Netflix shows are a nice touch) and the food is, well, typical United: mediocre.
11 or 12 or however many hours later, a nice smooth landing into Japan at Narita International Airport.