I know, tacky American and his Park Hopping. But I like options! And I thought I'd share this with the group cause I know there are quite a few of us that are going over there in April and May. And I believe this to be new. I just read on the resort's website, that when staying at the 3 TDR Hotels you are allowed to purchase multi-day tickets that allow you to visit both Parks beginning on your first day. I've copied the segment below. It was found under guest benefits.
7. Limited Sale of Multi-Day Passport Special (April 1, 2009 through March 31, 2010) During the above period, the Disney Hotels will offer Multi-Day Passport Special tickets that allow Guests to visit both Tokyo Disneyland and Tokyo DisneySea as they like from their very first day.