To make the most of a Disneyworld trip it's often advisable to wake up early and be at the park right when they open. Get the super popular rides out of the way right when the park opens, before the lines start to build up, and then do the less popular rides later in the evening.
In order to make this work, however, you have to know what the popular rides are.
For Disneyworld there are websites like https://touringplans.com/walt-disney-world/touring-plans and books like Unofficial Guide to Walt Disney World 2019 that are updated every year with the latest info.
My question is... are there similar sites or books for Disneyland Tokyo (or any of the other Disneyland's?)
I guess a related question to this... in my experience with Disneyworld, if you're sufficiently aggressive (as I described above), I'd say it's possible to do each of the four parks (Magic Kingdom, Epcot, Hollywood Studios and Animal Kingdom) in a day. Disneyland Tokyo (or more generally every other Disneyland) seems to be equivalent to one of the four parks at Disneyworld so if one park can be done in a day for Disneyworld then would it be fair to say that Disneyland Tokyo could probably also be done in a day?