@The Mom or another moderator will move this to the proper forum. Thanks as always,
@The Mom et. al.!
But to answer your question, Tokyo Disney does not require a reservation to enter the parks. However, you should use the TDR Navi (not to be confused with Na'vi) site to make sure you visit on a low-crowding day. Arrive before the park opens. And buy your tickets in advance. Also, spend a day at each of the two parks, but DisneySea is the real masterpiece (spend two days there if you can). At DisneySea, ride Journey to the Center of the Earth and Tower of Terror before those lines get long. I had a wonderful time visiting Tokyo Disney, and I hope you will, too!