I'm not one to turn away a willing hand!
Seriously, it's going to be much hotter here in the summer than you're accustomed to in Hawaii. You'll also find that many people are adverse to air-conditioning, so that may take a bit of getting used to as well.
Will you have to ride the trains, or will you be getting a car? They both have their respective advantages and disadvantages around Tokyo. Hope your a "people" person, as you'll be sharing the city with 12,000,000 of your closest friends.
