Robert, as far as what I'd like to see in Tokyo, pretty much every square inch,. Both places look so amazing, you feel like you'll miss some detail if you blink. Any interesting little quiet areas nobody knows, as well as the big E ticket attractions such as Journey to the Center of the Earth, please!
Have a great trip, brother!
Three new areas will be built,
Mystic Point-Coming in 2013 Grizzly Gulch- Coming in 2012Toy Story Land- Coming in 2012These areas will include high tech rides includinga half pipe roller coaster(RC Racer, Toy Story Land), a vekoma launched mine train coaster(Big Grizzly Mountain Runaway Mine Cars, Grizzly Gulch)and a high tech Haunted Mansion ride(Mystic Manor, Mystic Point).I am dying to see you review this upcoming expansion.
In addition to rides at Tokyo Disney Resort, be sure to check out the live entertainment. It is among the best in the world among theme park entertainment, and in some cases (Big Band Beat) the best in the world period.
At TDL, you'll want to see the daytime parade, Jubilation, and Tokyo Disneyland Electrical Parade Dreamlights. If you only have time for one, skip Jubilation but don't miss Dreamlights--the Genie float from Aladdin alone is well worth it.
At TDS, see Big Band Beat, The Legend of Mythica, and Fantasmic. Don't miss any of those--they're all incredible. However, if you want a decent seat for Fantasmic, get there early since it's still relatively new. When I visited in September, I picked a seat at Lido Isle three hours before show time. It was well worth it, and this version is completely unlike the California or Florida versions.
If time and budget permits, you'll also want to see ZED, the Cirque du Soleil show located near the Disney Ambassador Hotel. If you're familiar with La Nouba in Orlando, it's a similar seperate-ticket event. There are show tickets that will get you into the park for only an additional 1000 yen after you've seen the show. Full disclosure: I work for Cirque du Soleil and was part of the opening team of ZED, however it's closing later this year so this is your final opportunity to see it and I highly recommend it.
Aside from entertainment, enjoy as many flavors of popcorn as you have time for. They're themed to the various areas of the park--Hunny Popcorn near Pooh's Hunny Hunt, Sea Salt Popcorn in Mermaid Lagoon, etc.
Try to eat at Magellen's in TDS. Yes there is a secret room behind a bookshelf. It's a really fun experience.
And Pooh's Hunny Hunt is the most incredible ride in the world. Ever. Anywhere. If you want to ride it (and other fantasyland attractions) with little to no wait go after Dreamlights and the fireworks as the families that make these rides so popular tend to leave as soon as the night time entertainment is over.
Have a great trip!
And strawberry popcorn. And everything at DisneySea.